US20240065948A1 - Film-forming composition for skin - Google Patents
Film-forming composition for skin Download PDFInfo
- Publication number
- US20240065948A1 US20240065948A1 US18/254,901 US202118254901A US2024065948A1 US 20240065948 A1 US20240065948 A1 US 20240065948A1 US 202118254901 A US202118254901 A US 202118254901A US 2024065948 A1 US2024065948 A1 US 2024065948A1
- Authority
- US
- United States
- Prior art keywords
- film
- fiber
- skin
- less
- mass
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- UJMBCXLDXJUMFB-UHFFFAOYSA-K trisodium;5-oxo-1-(4-sulfonatophenyl)-4-[(4-sulfonatophenyl)diazenyl]-4h-pyrazole-3-carboxylate Chemical compound [Na+].[Na+].[Na+].[O-]C(=O)C1=NN(C=2C=CC(=CC=2)S([O-])(=O)=O)C(=O)C1N=NC1=CC=C(S([O-])(=O)=O)C=C1 UJMBCXLDXJUMFB-UHFFFAOYSA-K 0.000 description 1
- PBYZMCDFOULPGH-UHFFFAOYSA-N tungstate Chemical compound [O-][W]([O-])(=O)=O PBYZMCDFOULPGH-UHFFFAOYSA-N 0.000 description 1
- 235000013799 ultramarine blue Nutrition 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
- RSJKGSCJYJTIGS-UHFFFAOYSA-N undecane Chemical compound CCCCCCCCCCC RSJKGSCJYJTIGS-UHFFFAOYSA-N 0.000 description 1
- 239000012178 vegetable wax Substances 0.000 description 1
- 239000010455 vermiculite Substances 0.000 description 1
- 229910052902 vermiculite Inorganic materials 0.000 description 1
- 235000019354 vermiculite Nutrition 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 229920003169 water-soluble polymer Polymers 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 1
- CPYIZQLXMGRKSW-UHFFFAOYSA-N zinc;iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[Fe+3].[Fe+3].[Zn+2] CPYIZQLXMGRKSW-UHFFFAOYSA-N 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
- OENHQHLEOONYIE-JLTXGRSLSA-N β-Carotene Chemical compound CC=1CCCC(C)(C)C=1\C=C\C(\C)=C\C=C\C(\C)=C\C=C\C=C(/C)\C=C\C=C(/C)\C=C\C1=C(C)CCCC1(C)C OENHQHLEOONYIE-JLTXGRSLSA-N 0.000 description 1
Images
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
- A61K8/0241—Containing particulates characterized by their shape and/or structure
- A61K8/027—Fibers; Fibrils
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/19—Cosmetics or similar toiletry preparations characterised by the composition containing inorganic ingredients
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/19—Cosmetics or similar toiletry preparations characterised by the composition containing inorganic ingredients
- A61K8/27—Zinc; Compounds thereof
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/19—Cosmetics or similar toiletry preparations characterised by the composition containing inorganic ingredients
- A61K8/29—Titanium; Compounds thereof
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
- A61K8/81—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- A61K8/8141—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- A61K8/8147—Homopolymers or copolymers of acids; Metal or ammonium salts thereof, e.g. crotonic acid, (meth)acrylic acid; Compositions of derivatives of such polymers
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
- A61K8/81—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- A61K8/8141—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- A61K8/8158—Homopolymers or copolymers of amides or imides, e.g. (meth) acrylamide; Compositions of derivatives of such polymers
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
- A61K8/84—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions otherwise than those involving only carbon-carbon unsaturated bonds
- A61K8/85—Polyesters
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- A61Q1/00—Make-up preparations; Body powders; Preparations for removing make-up
- A61Q1/02—Preparations containing skin colorants, e.g. pigments
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- A61Q17/00—Barrier preparations; Preparations brought into direct contact with the skin for affording protection against external influences, e.g. sunlight, X-rays or other harmful rays, corrosive materials, bacteria or insect stings
- A61Q17/04—Topical preparations for affording protection against sunlight or other radiation; Topical sun tanning preparations
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
- A61K2800/40—Chemical, physico-chemical or functional or structural properties of particular ingredients
- A61K2800/41—Particular ingredients further characterized by their size
- A61K2800/412—Microsized, i.e. having sizes between 0.1 and 100 microns
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
- A61K2800/40—Chemical, physico-chemical or functional or structural properties of particular ingredients
- A61K2800/42—Colour properties
- A61K2800/43—Pigments; Dyes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
- A61K2800/80—Process related aspects concerning the preparation of the cosmetic composition or the storage or application thereof
- A61K2800/95—Involves in-situ formation or cross-linking of polymers
Definitions
- the present invention relates to a film-forming composition for skin that can form a favorable cosmetic film on a skin surface.
- Patent Literature 1 a composition containing a fiber and a copolymer including a carboxylate group and a polydimethylsiloxane group in a physiologically acceptable medium
- Patent Literature 2 A technique of incorporating a fiber in a cosmetic for reducing the irritation of a cosmetic including an irritative component (Patent Literature 2) and a cosmetic including a fiber and an anti-aging agent for camouflaging skin imperfections and treating signs of skin aging (Patent Literature 3) have been also reported.
- Patent Literature 4 Furthermore, it has been reported to blend a fiber dispersion with a monofilament diameter of 1 to 500 nm and the sum Pa of the monofilament ratio of 60% or more, in order to obtain a blended solution, emulsion, or gel excellent in uniform dispersibility and long-term dispersion stability. Furthermore, a cosmetic containing a short fiber obtained by cutting a hyperfine synthetic fiber having a diameter of about 2 ⁇ m into a length of 5 to 50 ⁇ m has been reported (Patent Literature 5).
- the present invention relates to a film-forming composition for skin, comprising the following components (A) and (B):
- the present invention relates to a method for producing a film on a skin surface, comprising applying the film-forming composition for skin to the skin.
- the present invention relates to a film comprising the film-forming composition for skin.
- FIG. 1 is a schematic diagram showing a structure of the electrostatic spraying device used for forming a fiber of a component (B).
- the present invention provides a film-forming composition for skin that can form a stable film on skin, make the finish of skin bright, and make the roughness of the skin texture and the pores inconspicuous.
- a film-forming composition for skin prepared by blending a fine short fiber having a predetermined fiber diameter and aspect ratio and a powder at a predetermined ratio can form a stable film on skin.
- a stable film can be formed on skin.
- the roughness of the skin texture and the pore can be wholly covered by attaching both the film-forming composition for skin of the present invention and powdery foundation to the skin, imparting a smooth finish thereto.
- the film-forming composition for skin of the present invention contains the following components (A) and (B):
- the powder of the component (A) is a component providing various cosmetic effects to the film formed using the film-forming composition of the present invention on skin.
- a powder (A) is a solid other than the component (B) and can significantly make the finish of skin bright and make the roughness of the skin texture and the pores inconspicuous when used together with the component (B) compared when it is used as an ordinary powder-containing cosmetic or when it is used together with a conventional fiber having a large fiber diameter.
- the powder of the component (A) is not particularly limited as long as it is a powder for cosmetics, and a color pigment or an extender pigment can be used. Among them, from the viewpoint of obtaining an excellent makeup effect, it is preferable to contain a color pigment.
- examples of the color pigment (A 1 ) include an inorganic color pigment, an inorganic white pigment, an organic color pigment, and an organic dye and also include a pearl pigment (brilliant powder).
- Examples of the inorganic color pigment contained in the present invention composition specifically include inorganic color pigments, such as red iron oxide, iron hydroxide, iron titanate, yellow iron oxide, black iron oxide, carbon black, Prussian blue, ultramarine blue, Prussian blue titanium oxide, black titanium oxide, a titanium/titanium oxide sintered product, manganese violet, cobalt violet, chromium oxide, chromium hydroxide, cobalt oxide, and cobalt titanate.
- Examples of the inorganic white pigment include titanium oxide, zinc oxide, calamine, zirconium oxide, magnesium oxide, cerium oxide, aluminum oxide, and composites thereof.
- One or two or more of these pigments can be used.
- organic color pigment and organic dye examples include organic tar pigments, such as Red No. 3, Red No. 102, Red No. 104, Red No. 106, Red No. 201, Red No. 202, Red No. 204, Red No. 205, Red No. 220, Red No. 226, Red No. 227, Red No. 228, Red No. 230, Red No. 401, Red No. 405, Red No. 505, Orange No. 203, Orange No. 204, Orange No. 205, Yellow No. 4, Yellow No. 5, Yellow No. 401, Blue No. 1, and Blue No. 404; and organic dyes, such as ⁇ -carotene, caramel, and a paprika dye.
- the examples include those coated with polymers such as cellulose or polymethacrylate ester.
- pearl pigment examples include fish scale foil, titanium oxide-coated mica (mica titanium), bismuth oxychloride, titanium oxide-coated bismuth oxychloride, titanium oxide-coated talc, titanium oxide-coated colored mica, titanium oxide/iron oxide-coated mica, fine particle titanium oxide-coated mica titanium, fine particle zinc oxide-coated mica titanium, organic pigment-treated mica titanium, low-order titanium oxide-coated mica, titanium oxide-coated synthetic mica, titanium oxide-coated plate-like silica, hollow plate-like titanium oxide, iron oxide-coated mica, plate-like iron oxide (MIO), aluminum flake, stainless steel flake, titanium oxide-coated plate-like alumina, glass flake, titanium oxide-coated glass flake, pearl shell, gold foil, a gold-deposited resin film, and a metal-deposited resin film. One or two or more of them can be used.
- extender pigment examples include inorganic extender pigments and organic extender pigments.
- inorganic extender pigment examples include barium sulfate, calcium sulfate, magnesium sulfate, magnesium carbonate, calcium carbonate, talc, mica, kaolin, sericite, silicic acid, silicic anhydride, aluminum silicate, magnesium silicate, magnesium aluminum silicate, calcium silicate, barium silicate, strontium silicate, metal tungstate, hydroxyapatite, vermiculite, clay, bentonite, montmorillonite, hectorite, smectite, zeolite, ceramic powder, dicalcium phosphate, alumina, silica, aluminum hydroxide, boron nitride, synthetic mica, synthetic sericite, metallic soap, and barium sulfate-treated mica. One or two or more of them can be used.
- organic extender pigment examples include a silicone rubber powder, a silicone resin-coated silicone rubber powder, polymethylsilsesquioxane, a polyamide powder, a nylon powder, a polyester powder, a polypropylene powder, a polystyrene powder, a polyurethane powder, a vinyl resin powder, a urea resin powder, a phenolic resin powder, a fluorine resin powder, a silicone resin powder, an acrylic resin powder, a melamine resin powder, a polycarbonate resin, a divinylbenzene/styrene copolymer, a silk powder, a wool powder, a cellulose powder, a long-chain alkyl phosphate metal salt, N-mono (long-chain) alkylacyl basic amino acid, and composites thereof. One or two or more of them can be used.
- Composite powders of the inorganic powder and the organic powder can also be used.
- the particle diameter of the powder is preferably 0.01 ⁇ m or more and 500 ⁇ m or less, more preferably 0.02 ⁇ m or more and 100 ⁇ m or less, further preferably 0.03 ⁇ m or more and 10 ⁇ m or less, and even more preferably 0.03 ⁇ m or more and 2 ⁇ m or less.
- the shape of the powder examples include spherical, plate-like, granular, and amorphous.
- the aspect ratio (average length/average thickness) is preferably less than 20, more preferably less than 15, and further preferably less than 10.
- the powders can also be used after hydrophobic treatment, and one or two or more of these powders hydrophobized can also be used.
- the hydrophobic treatment is not limited as long as it is treatment that is applied to ordinary powders for cosmetics, and may be performed using a surface treatment agent such as a silicone compound, an alkylsilane, metal soap, an amino acid compound, lecithin, organic titanate, a fluorine compound, an acrylic resin, a methacrylic resin, or a urethane resin by dry treatment, wet treatment, or the like.
- hydrophobic treatment preferred are surface treatment, for example, treatment with a silicone compound such as dimethylpolysiloxane, methyl hydrogen polysiloxane, cyclic silicone, or one-terminal or both-terminal trialkoxy group-modified organopolysiloxane; treatment with an alkylsilane such as methyltrimethoxysilane, ethyltrimethoxysilane, hexyltrimethoxysilane, caprylyl trimethoxysilane, or caprylyl triethoxysilane; treatment with metal soap such as aluminum stearate, aluminum myristate, zinc stearate, or magnesium stearate; treatment with an amino acid compound such as proline, hydroxyproline, alanine, glycine, sarcosine, glutamic acid, aspartic acid, lysine, or a derivative thereof; lecithin treatment; treatment with an organic titanate such as isopropyl titanium triisost
- the content of the component (A) powder in the present invention film-forming composition for skin is preferably 0.5 mass % or more, more preferably 1 mass % or more, and further preferably 5 mass % or more from the viewpoint of improving the durability of the film and the viewpoint of making the finish of skin bright where the film is formed and being capable of making the roughness of the skin texture and the pores inconspicuous.
- the content is preferably 94 mass % or less, more preferably 60 mass % or less, further preferably 50 mass % or less, and even more preferably 40 mass % or less.
- the component (A) powder preferably contains a color pigment (A 1 ) as described above, and the content of the color pigment in the film-forming composition for skin of the present invention is preferably 0.1 mass % or more and 60 mass % or less from the viewpoint of obtaining an excellent makeup effect.
- the content is more preferably 0.3 mass % or more, further preferably 1 mass % or more and is more preferably 50 mass % or less, further preferably 40 mass % or less, and preferably 30 mass % or less.
- the content mass ratio of the color pigment (A 1 ) to the component (A), (A 1 /A), is preferably 0.3 or more, more preferably 0.4 or more, and further preferably 0.5 or more.
- the mass ratio is preferably 1 or less, more preferably 0.95 or less, and further preferably 0.9 or less.
- the component (B) is a fiber having an average fiber diameter 0.1 ⁇ m or more and 7 ⁇ m or less and an aspect ratio (average fiber length/average fiber diameter) of 20 or more and 300 or less.
- the component (B) can forms a network in the formed film, provides durability to the film, makes the finish of skin bright where the film is formed, and makes the roughness of the skin texture and the pores inconspicuous.
- the component (B) is present as a solid in the film-forming composition.
- the network is a state that fibers dispersed in the film have intersections with each other to have gaps between the fibers and is a state that the component contained in the film-forming composition is retained in the gaps.
- the intersection of fibers is preferably a state that, for example, one fiber has two or more intersections with other two or more fibers, and the fibers are involved with each other.
- the average fiber diameter is generally the diameter of a cross-section of a fiber.
- the fiber diameter is the diameter of the circle
- the fiber diameter is the longitudinal diameter of the ellipse.
- the average fiber diameter of the fiber used in the present invention is 0.1 ⁇ m or more and 7 ⁇ m or less from the viewpoint of improving the followability of the fiber to the skin in the formed film and improving the durability and the viewpoint of making the finish of skin bright where the film is formed and making the roughness of the skin texture and the pores inconspicuous.
- the average fiber diameter is preferably 0.2 ⁇ m or more and more preferably 0.3 ⁇ m or more from the viewpoint of improving the durability and the viewpoint of making the finish of skin bright where the film is formed and making the roughness of the skin texture and the pores inconspicuous.
- the average fiber diameter is preferably 5 ⁇ m or less, more preferably 4 ⁇ m or less, and further preferably 3 ⁇ m or less from the viewpoint of improving the durability and the viewpoint of making the finish of skin bright where the film is formed and making the roughness of the skin texture and the pores inconspicuous.
- the average fiber diameter can be measured by observing fibers with an SEM at a magnification of 2000 times or 5000 times, arbitrarily selecting, from the two-dimensional image, 100 fibers excluding defects (e.g., clumps of fibers and crossing parts of fibers), drawing a line perpendicular to the longitudinal direction of each of the fibers, and directly reading the fiber diameters. The arithmetic average of these measured values is determined as the average fiber diameter. Since the fibers are dispersed in the film-forming composition, the film-forming composition is thinly applied to a substrate, and measurement by SEM observation is performed.
- the length of the fiber is preferably 20 ⁇ m or more and 300 ⁇ m or less as the average fiber length from the viewpoint of a length of facilitating network formation and improving the durability of the formed film by the network and the viewpoint of making the finish of skin bright where the film is formed and making the roughness of the skin texture and the pores inconspicuous.
- the average fiber length is more preferably 25 ⁇ m or more, further preferably 30 ⁇ m or more, and further preferably 40 ⁇ m or more from the viewpoint of facilitating network formation and the viewpoint of making the finish of skin bright where the film is formed and making the roughness of the skin texture and the pores inconspicuous.
- the average fiber length is more preferably 250 ⁇ m or less and further preferably 200 ⁇ m or less from the viewpoint of suppressing tangles and twists between fibers at the time of application of the composition and the viewpoint of making the finish of skin bright where the film is formed and making the roughness of the skin texture and the pores inconspicuous.
- the average fiber length can be measured by observing fibers with an SEM at a magnification of 250 times to 750 times according to the length of the fibers, arbitrarily selecting, from the two-dimensional image, 100 fibers excluding defects (e.g., clumps of fibers and crossing parts of fibers), drawing a line in the longitudinal direction of each of the fibers, and directly reading the fiber lengths. The arithmetic average of these measured values is determined as the average fiber length.
- the aspect ratio of the fiber (average fiber length)/(average fiber diameter) is preferably 20 or more and 300 or less from the viewpoint of the durability of the film by forming a uniform network and the viewpoint of making the finish of skin bright where the film is formed and making the roughness of the skin texture and the pores inconspicuous.
- the aspect ratio is more preferably 25 or more, further preferably 27 or more, and further preferably 30 or more from the viewpoint of the durability of the film and the viewpoint of making the finish of skin bright where the film is formed and making the roughness of the skin texture and the pores inconspicuous.
- the aspect ratio is more preferably 250 or less and further preferably 200 or less from the viewpoint of the durability of the film and the viewpoint of making the finish of skin bright where the film is formed and making the roughness of the skin texture and the pores inconspicuous.
- the CV (coefficient of variation) value of the fiber length of the component (B) is preferably 40% or more and 100% or less from the viewpoint that the fiber forms a network in the film.
- the CV value is more preferably 42% or more and further preferably 45% or more from the viewpoint of facilitating network formation and the viewpoint of making the finish of skin bright where the film is formed and making the roughness of the skin texture and the pores inconspicuous.
- the CV value is preferably 95% or less and further preferably 90% or less from the viewpoint of enhancing the storage stability of the composition.
- the CV value is calculated from the measured values obtained by the above-described fiber length-measuring method by the expression: (standard deviation of measured fiber lengths)/(average fiber length) ⁇ 100 (%).
- the fiber of the component (B) preferably includes a fiber having a fiber length of 40 ⁇ m or more and more preferably a fiber having a fiber length of 50 ⁇ m or more from the viewpoint of forming a strong network in the film and enhancing the durability of the obtained film and the viewpoint of making the finish of skin bright where the film is formed and making the roughness of the skin texture and the pores inconspicuous.
- the rate of the number of fibers having a fiber length of 40 ⁇ m or more to the total fibers is preferably 5% or more and 100% or less from the viewpoint of forming a strong network in the film and enhancing the durability of the obtained film and the viewpoint of making the finish of skin bright where the film is formed and making the roughness of the skin texture and the pores inconspicuous.
- the fibers having a length of 40 ⁇ m or more is more preferably contained at a rate of 8% or more and 100% or less and is further preferably contained at a rate of 15% or more and 100% or less from the viewpoint of further improving the durability and the viewpoint of making the finish of skin bright where the film is formed and making the roughness of the skin texture and the pores inconspicuous.
- This rate of the number of fibers is measured by adjusting the magnification of the SEM within ⁇ 200 to ⁇ 750 according to the fiber length such that 20 to 30 fibers are present in one imaging screen of the SEM and, in this state, measuring the fiber lengths of all fibers in the image for eliminating arbitrariness. The measurement is performed for 200 or more fibers in total.
- the fiber of the component (B), i.e., the fiber of a water-insoluble polymer, can be manufactured by obtaining a fiber from a fiber-forming polymer by various known spinning technologies and subjecting the fiber for shortening treatment.
- the fiber-forming polymer is usually a thermoplastic or solvent-soluble chain polymer molecule.
- the fiber-forming polymer is preferably a thermoplastic resin and more preferably a thermoplastic resin having a weight-average molecular weight of 1.0 ⁇ 10 4 g/mol or more and 2.0 ⁇ 10 5 g/mol or less.
- a water-insoluble polymer is preferably used for maintaining the form of the fiber in a film-forming agent.
- the spinning method is preferably an electrospinning method for efficiently obtaining a fiber having a small fiber diameter. Specifically, solution spinning and melt spinning are mentioned.
- fiber of a water-insoluble polymer refers to a fiber having a property that when 1 g of the fiber is weighed in an environment of 23° C. and 1 atm and is then immersed in 10 g of deionized water for 24 hours, the dissolved amount of the immersed fiber does not exceed 0.5 g.
- water-insoluble polymer examples include a completely saponified polyvinyl alcohol that can be insolubilized after film formation; a partially saponified polyvinyl alcohol that can be crosslinked after film formation by using a crosslinking agent together; oxazoline-modified silicone, such as a poly(N-propanoylethyleneimine) graft-dimethylsiloxane/ ⁇ -aminopropylmethylsiloxane copolymer; biodegradable resins, such as polyvinylacetal diethylaminoacetate, zein (major component of corn protein), polylactic acid (PLA), polybutylene succinate, polyglycolic acid, polycaprolactone, and polyhydroxy alkanoic acid; polyester resins, such as polyethylene terephthalate (PET) and polybutylene terephthalate; acrylic resins, such as a polyacrylonitrile resin and a polymethacrylic acid resin; and a polystyrene resin,
- water-insoluble polymers it is preferable to use one or two or more selected from the group consisting of a completely saponified polyvinyl alcohol that can be insolubilized after film formation, a partially saponified polyvinyl alcohol that can be crosslinked after film formation by using a crosslinking agent together, a polymethacrylic acid resin and other acrylic resins, a polyvinylacetal resin, a polyurethane resin, polylactic acid, an oxazoline-modified silicone such as a poly(N-propanoylethyleneimine) graft-dimethylsiloxane/ ⁇ -aminopropylmethylsiloxane copolymer, polyvinylacetal diethylaminoacetate, and zein.
- a completely saponified polyvinyl alcohol that can be insolubilized after film formation a partially saponified polyvinyl alcohol that can be crosslinked after film formation by using a crosslinking agent together
- nanofibers from the viewpoint of the ease in formation of nanofibers, more preferred are one or two or more selected from the group consisting of a polyvinylbutyral resin, an acrylic resin, a polypropylene resin, a polyester such as polylactic acid, and a polyurethane resin.
- the acrylic resin is preferably an (octyl acrylamide/hydroxypropyl acrylate/butylaminoethyl methacrylate) copolymer.
- biodegradable resin such as polylactic acid, polybutylene succinate, polyglycolic acid, polycaprolactone, and polyhydroxy alkanoic acid.
- biodegradability means that the degree of biodegradation of a polyester measured in accordance with JIS K6953-1 is 30% or more.
- Examples of the means for fiber shortening treatment include cutting, shearing, crushing, pulverizing, disintegrating, and defibrating.
- an impact crusher such as a mechanical vortex crusher or a hammer crusher, a jet grinder such as a jet mill, a medium grinder such as a ball mill or a rod mill, a dry grinder such as a cutter mill grinder or a disc mill grinder, a media grinder using a liquid medium, a wet grinder using a medialess grinder, or a combination thereof.
- a fiber assembly in which nanofibers are entangled, e.g., nonwoven fabric, is manufactured the fiber assembly is then cut into an appropriate size, and then a mechanical vortex grinder, a cutter mill grinder, a disc mill grinder, a wet high-speed shear medialess grinder, or a wet high-pressure shear medialess grinder is used.
- a mechanical vortex grinder e.g., a cutter mill grinder, a disc mill grinder, a wet high-speed shear medialess grinder, or a wet high-pressure shear medialess grinder.
- the fiber assembly include, in addition to nonwoven fabric, those having a prescribed thickness, such as flocculate.
- the content of the component (B) in the present invention composition is 0.1 mass % or more and 10 mass % or less relative to the whole film-forming composition from the viewpoint of the durability of the formed film and the ease in formation of a fiber network and the viewpoint of making the finish of skin bright where the film is formed and making the roughness of the skin texture and the pores inconspicuous.
- the content is preferably 0.5 mass % or more and more preferably 0.7 mass % or more from the viewpoint of the durability of the film and the ease in formation of a fiber network and the viewpoint of making the finish of skin bright where the film is formed and making the roughness of the skin texture and the pores inconspicuous.
- the content is preferably 9 mass % or less and further preferably 8 mass % or less.
- the content of the component (B) relative to the whole film-forming composition can be determined as follows. Firstly, a fiber of a water-insoluble polymer recognized by the above-described definition of a water-insoluble polymer is obtained from the fibers contained in the composition. Secondly, the fiber is washed with a solvent in which the fiber is insoluble, and only the fiber of a water-insoluble polymer is obtained through filtration.
- the resin contained in the component (B) is an ester resin such as PLA
- the solvent is preferably ethanol.
- the resin is acrylic
- the solvent is preferably water.
- the obtained fiber of a water-insoluble polymer can be measured to determine the mass.
- the mass ratio of the component (B) to the component (A), (B/A), in the present invention composition is 0.02 or more and 0.4 or less from the viewpoint of the durability of the film and the ease in formation of a fiber network and the viewpoint of making the finish of skin bright where the film is formed and making the roughness of the skin texture and the pores inconspicuous.
- the mass ratio (B/A) is preferably 0.03 or more, more preferably 0.05 or more, and further preferably 0.1 or more from the viewpoint of the durability of the film and the ease in formation of a fiber network and the viewpoint of making the finish of skin bright where the film is formed and making the roughness of the skin texture and the pores inconspicuous.
- the mass ratio (B/A) is preferably 0.35 or less from the viewpoint of the durability of the film and the ease in formation of a fiber network and the viewpoint of making the finish of skin bright where the film is formed and making the roughness of the skin texture and the pores inconspicuous and is more preferably 0.33 or less and further preferably 0.31 or less from the viewpoint of making the finish of skin bright where the film is formed and making the roughness of the skin texture and the pores inconspicuous.
- the (average fiber diameter) 2 /fiber content ( ⁇ m 2 /mass %) is within a range of 0.005 or more and 7 or less.
- the fiber content means the mass % of the fiber in the film-forming composition.
- This value is preferably 0.02 or more, more preferably 0.03 or more, and further preferably 0.05 or more from the viewpoint of sufficiently forming a uniform network of the fiber.
- the value is preferably 6 or less, more preferably 5 or less, and further preferably 4 or less.
- This value i.e., (average fiber diameter) 2 /fiber content ( ⁇ m 2 /mass %), is an index of the cumulative length of the fiber included in the composition and means that the larger this value, the shorter the cumulative length.
- the present invention composition preferably contains a liquid material (component (C)) selected from the group consisting of water and nonvolatile oils that are liquid at 20° C. as a dispersion medium of the component (B) in order to facilitate the formation of a network of the fiber of the component (B) in the film formed on skin when the present invention composition is applied to the skin.
- component (C) selected from the group consisting of water and nonvolatile oils that are liquid at 20° C. as a dispersion medium of the component (B) in order to facilitate the formation of a network of the fiber of the component (B) in the film formed on skin when the present invention composition is applied to the skin.
- film-forming composition since the component (B) is present dispersed or dissolved in the component (C), it becomes easy to form a network of the fiber of the component (B).
- the component (C) is a liquid material selected from the group consisting of water and nonvolatile oils that are liquid at 20° C.
- the component (C) include water and one or two or more oils selected from the group consisting of ester oils, ether oils, hydrocarbon oils, higher alcohols, fluorine oils, and nonvolatile silicone oils. In the present invention, they are preferably used singly or in combinations of two or more thereof.
- the volatile oil in the present invention is an oil having a vapor pressure at 20° C. of 0.01 kPa or more and 106.66 kPa or less
- the nonvolatile oil is an oil that is liquid at 20° C. other than the volatile oils.
- ester oil it is possible to use one or two or more selected from the group consisting of esters consisting of linear or branched fatty acid and linear or branched alcohol or polyhydric alcohol and triglycerol fatty acid esters (triglycerides).
- ether oil examples include alkyl-1,3-dimethylbutyl ether such as cetyl dimethylbutyl ether, ethylene glycol dioctyl ether, glycerol monooleyl ether, and dicaprylyl ether, and one or two or more selected therefrom can be used.
- alkyl-1,3-dimethylbutyl ether such as cetyl dimethylbutyl ether, ethylene glycol dioctyl ether, glycerol monooleyl ether, and dicaprylyl ether, and one or two or more selected therefrom can be used.
- hydrocarbon oil examples include hydrocarbon oils that are liquid at 20° C., such as liquid paraffin, squalane, squalene, polyisobutene (pentamer or higher), and liquid isoparaffin.
- higher alcohol examples include higher alcohols having from 12 to 20 carbon atoms, specifically, lauryl alcohol, isostearyl alcohol, oleyl alcohol, and octyldodecanol, and one or two or more selected therefrom can be used.
- animal and vegetable oils including the above-mentioned ester oils and hydrocarbon oils can be used.
- animal and vegetable oil include olive oil, jojoba oil, macadamia nut oil, meadowfoam oil, castor oil, safflower oil, sunflower oil, avocado oil, canola oil, apricot kernel oil, rice germ oil, and rice bran oil.
- silicone oil examples include dimethylpolysiloxane (5 cs or more), polyether-modified silicone, amino-modified silicone, carboxy-modified silicone, methylphenylpolysiloxane, fatty acid-modified silicone, alcohol-modified silicone, aliphatic alcohol-modified silicone, epoxy-modified silicone, fluorine-modified silicone, cyclic silicone, and alkyl-modified silicone.
- dimethylpolysiloxane 5 cs or more
- polyether-modified silicone amino-modified silicone
- carboxy-modified silicone methylphenylpolysiloxane
- fatty acid-modified silicone alcohol-modified silicone
- aliphatic alcohol-modified silicone aliphatic alcohol-modified silicone
- epoxy-modified silicone fluorine-modified silicone
- cyclic silicone cyclic silicone
- alkyl-modified silicone alkyl-modified silicone.
- silicone oil it is preferable to use at least dimethylpolysiloxane (5 c
- fluorine oil examples include perfluorodecaline, perfluoroadamantane, perfluorobutyl tetrahydrofuran, perfluorooctane, perfluorononane, perfluoropentane, perfluorodecane, perfluorododecane, and per fluoropolyether.
- the content of the component (C) in the present invention composition is preferably 5 mass % or more, more preferably 10 mass % or more, further preferably 15 mass % or more, and even more preferably 20 mass % or more considering the practical blending amount from the viewpoint of the dispersibility of the component (B) and the durability of the formed film.
- the content is preferably 98 mass % or less, more preferably 90 mass % or less, further preferably 70 mass % or less, and even more preferably 50 mass % or less.
- the content and skeletal structure of the component (C) can be identified by specifying the molecular structure by a known technology, such as NMR (nuclear magnetic resonance apparatus), chromatography, or IR analysis, or a combination thereof.
- the content of the component (C) can be measured by the measurement method above, for example, based on the intensity of the measured value of the portion showing the skeletal structure.
- the content of water (C 1 ) of the component (C) in the film-forming composition is preferably 1 mass % or more, more preferably 5 mass % or more, further preferably 10 mass % or more, and even more preferably 15 mass % or more and is preferably 98 mass % or less, more preferably 90 mass % or less, further preferably 70 mass % or less, and even more preferably 50 mass % or less from the viewpoint of the durability of the film, the viewpoint of the ease in formation of a fiber network, and the viewpoint of making the finish of skin bright where the film is formed and making the roughness of the skin texture and the pores inconspicuous.
- the mass ratio of the component (C 1 ) to the component (C), (C 1 )/(C), is preferably 0.4 or more, more preferably 0.5 or more, further preferably 0.6 or more, and even more preferably 0.7 or more and is preferably 0.96 or less, more preferably 0.9 or less, further preferably 0.85 or lee, and even more preferably 0.8 or less from the viewpoint of film formation and the durability of the film, the viewpoint of the ease in formation of a fiber network, and the viewpoint of forming a film excellent in scratch resistance.
- the film-forming composition for skin of the present invention can further contain an oil other than the component (C), a volatile component, a surfactant, a polyol that is liquid at 20° C., a preservative, a moisturizing agent, an ultraviolet absorber, a water-soluble polymer, an amino acid, a dye, and so on.
- the oil other than the component (C) is not limited as long as it is solid or semisolid at 20° C. and is used in ordinary cosmetics, and examples thereof include mineral-based waxes such as ozokerite and ceresin; petroleum waxes such as paraffin and microcrystalline wax; synthetic hydrocarbons such as Fischer-Tropsch wax, polyethylene wax, and synthetic hydrocarbon wax; vegetable waxes such as carnauba wax, candelilla wax, rice wax, sunflower wax, and highly hydrogenated jojoba oil; animal waxes such as beeswax Chinese wax, and whale wax; and synthetic waxes such as silicone wax and synthetic beeswax.
- mineral-based waxes such as ozokerite and ceresin
- petroleum waxes such as paraffin and microcrystalline wax
- synthetic hydrocarbons such as Fischer-Tropsch wax, polyethylene wax, and synthetic hydrocarbon wax
- vegetable waxes such as carnauba wax, candelilla wax, rice wax, sunflower wax, and highly hydrogenated jojoba oil
- Examples of the volatile component (D) include alcohols, ketones, volatile silicone oils, and volatile hydrocarbon oils, and preferred are one or more selected from the group consisting of alcohols, volatile silicone, and volatile hydrocarbon oils.
- the volatile component is a material having volatility in the liquid state.
- the volatile material has a vapor pressure at 20° C. of 0.01 kPa or more and 106.66 kPa or less.
- a monovalent chain aliphatic alcohol for example, a monovalent chain aliphatic alcohol, a monovalent cyclic aliphatic alcohol, or a monovalent aromatic alcohol is suitably used.
- the monovalent chain aliphatic alcohol include C 1 -C 6 chain alcohols
- examples of the monovalent cyclic aliphatic alcohol include C 4 -C 6 cyclic alcohols
- examples of the monovalent aromatic alcohol include benzyl alcohol and phenylethyl alcohol.
- Specific examples thereof include ethanol, isopropyl alcohol, butyl alcohol, phenylethyl alcohol, n-propanol, and n-pentanol. From the viewpoint of use impression, ethanol is preferable. These alcohols can be used alone or in combination of two or more.
- volatile silicone oil examples include linear dimethylpolysiloxanes, such as hexamethyldisiloxane (dimethylpolysiloxane (0.65 cs)), octamethyltrisiloxane (dimethylpolysiloxane (1 cs)), dimethylpolysiloxane (1.5 cs), and dimethylpolysiloxane (2 cs); branched siloxanes, such as methyl trimethicone, tris(trimethylsilyl)methylsilane, and tetrakis(trimethylsilyl)silane; and cyclic dimethylsiloxanes, such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexasiloxane.
- linear dimethylpolysiloxanes such as hexamethyldisiloxane (dimethylpolysiloxane (0.
- linear dimethylpolysiloxanes and branched siloxane preferred are linear dimethylpolysiloxanes and branched siloxane, and it is more preferable to include one or two or more selected from the group consisting of hexamethyldisiloxane (dimethylpolysiloxane (0.65 cs)), octamethyltrisiloxane (dimethylpolysiloxane (1 cs)), dimethylpolysiloxane (1.5 cs), dimethylpolysiloxane (2 cs), and methyl trimethicone, further preferable to at least include one or two or more selected from the group consisting of hexamethyldisiloxane (dimethylpolysiloxane (0.65 cs)), octamethyltrisiloxane (dimethylpolysiloxane (1 cs)), and methyl trimethicone, and even more preferable to at least include one or
- volatile hydrocarbon oil examples include paraffin-based hydrocarbon oils, such as n-decane, n-undecane, and n-dodecane; isoparaffin-based hydrocarbon oils, such as isodecane, isododecane, and hydrogenated polyisobutene; and cyclic paraffin hydrocarbon oils, such as cyclodecane and cyclododecane.
- paraffin-based hydrocarbon oils such as n-decane, n-undecane, and n-dodecane
- isoparaffin-based hydrocarbon oils such as isodecane, isododecane, and hydrogenated polyisobutene
- cyclic paraffin hydrocarbon oils such as cyclodecane and cyclododecane.
- isoparaffin-based hydrocarbon oils preferred are isoparaffin-based hydrocarbon oils, more preferred are isoparaffin-based hydrocarbon oils having from 8 to 16 carbon atoms, further preferred are isoparaffin-based hydrocarbon oils having from 10 to 16 carbon atoms, and it is even more preferable to at least include isododecane.
- the volatile oil it is preferable to include one or two or more selected from the group consisting of isododecane and dimethylpolysiloxane having a kinematic viscosity at 25° C. of 2 cSt or less from the viewpoint of excellent use impression and finish.
- the kinematic viscosity can be measured using, for example, an Ubbelohde viscometer.
- the content of the volatile component in the present invention composition is preferably 1 mass % or more relative to the whole film-forming composition, more preferably 10 mass % or more, further preferably 25 mass % or more and preferably 60 mass % or less, more preferably 50 mass % or less, and further preferably 45 mass % or less from the viewpoint of the durability of the formed film and the ease in formation of a fiber network and the viewpoint of making the finish of skin bright where the film is formed and making the roughness of the skin texture and the pores inconspicuous.
- surfactant examples include nonionic surfactants, anionic surfactants, and cationic surfactants, and particularly preferred are nonionic surfactants, such as a polyoxyethylene/methylpolysiloxane copolymer, a poly(oxyethylene/oxypropylene)methylpolysiloxane copolymer, crosslinked polyether-modified silicone, crosslinked alkylpolyether-modified silicone, cetyl dimethicone copolyol, sorbitan monooleate, glyceryl stearate, polyoxyethylene hydrogenated castor oil, polyoxyethylene alkyl ether, sorbitan sesquioleate, and diglyceryl monooleate.
- nonionic surfactants such as a polyoxyethylene/methylpolysiloxane copolymer, a poly(oxyethylene/oxypropylene)methylpolysiloxane copolymer, crosslinked polyether-modified silicone, crosslinked alkylpolyether-modified silicone, cety
- the content of the surfactant in the present invention composition is preferably 0.01 mass % or more relative to the whole film-forming composition, more preferably 0.1 mass % or more, and further preferably 0.3 mass % or more and preferably 10 mass % or less, more preferably 5 mass % or less, and further preferably 3 mass % or less from the viewpoint of the durability of the formed film and the ease in formation of a fiber network and the viewpoint of making the finish of skin bright where the film is formed and making the roughness of the skin texture and the pores inconspicuous.
- Examples of the polyol that is liquid at 20° C. include alkylene glycols, such as ethylene glycol, propylene glycol, 1,3-propanediol, and 1,3-butanediol; polyalkylene glycols, such as diethylene glycol, dipropylene glycol, and polyethylene glycol and polypropylene glycol each having a weight-average molecular weight of 2000 g/mol or less; and glycerins, such as glycerin, diglycerin, and triglycerin.
- alkylene glycols such as ethylene glycol, propylene glycol, 1,3-propanediol, and 1,3-butanediol
- polyalkylene glycols such as diethylene glycol, dipropylene glycol, and polyethylene glycol and polypropylene glycol each having a weight-average molecular weight of 2000 g/mol or less
- glycerins such as glycerin,
- ethylene glycol preferred are ethylene glycol, propylene glycol, 1,3-butanediol, dipropylene glycol, polyethylene glycol having a weight-average molecular weight of 2000 g/mol or less, glycerin, and diglycerin; more preferred are propylene glycol, 1,3-butanediol, and glycerin; and further preferred are propylene glycol and 1,3-butanediol.
- composition of the present invention examples include oily cosmetics and emulsified cosmetics, specifically, oily cosmetics, water-in-oil emulsified cosmetics, and oil-in-water emulsified cosmetics.
- oily cosmetics specifically, oily cosmetics, water-in-oil emulsified cosmetics, and oil-in-water emulsified cosmetics.
- emulsified cosmetics are preferable, and water-in-oil emulsified cosmetics are more preferable.
- the composition of the present invention can be manufactured by heating the components as needed and mixing them according to a usual method.
- the film-forming composition for skin of the present invention can be applied as, for example, makeup cosmetics, such as a makeup base, a foundation, a concealer, a blusher, an eyeshadow, a mascara, an eyeliner, an eyebrow, an overcoat agent, and a lipstick; ultraviolet protection cosmetics, such as a sunscreen emulsion and a sunscreen cream; and skincare cosmetics, such as a lotion, an emulsion, a cream, a serum, and a facial mask and is suitable as a makeup cosmetic or an ultraviolet protection cosmetic.
- makeup cosmetics such as a makeup base, a foundation, a concealer, a blusher, an eyeshadow, a mascara, an eyeliner, an eyebrow, an overcoat agent, and a lipstick
- ultraviolet protection cosmetics such as a sunscreen emulsion and a sunscreen cream
- skincare cosmetics such as a lotion, an emulsion, a cream, a serum, and a facial mask and is suitable as a makeup cosmetic or an ultraviolet protection cosmetic.
- the composition of the present invention is a film-forming composition for skin and can form a uniform film on a skin surface by being applied to the skin.
- the fiber forms a network, as a result, the obtained film has excellent durability.
- the fiber spreads over the sulci cutis and the cristae cutis, and the powder adheres to the fiber. Consequently, the finish of the skin is brightened, and the roughness of the skin texture and the pores can be wholly covered.
- the film-forming composition for skin of the present invention is attached to the skin together with a powdery foundation, the roughness of the skin texture and the pores can be wholly covered, and a smooth finish is obtained.
- a powder-containing cosmetic film excellent in durability can be formed on a skin surface by applying the composition of the present invention to the skin.
- means for applying the composition to the skin include finger application, spray application, application using a tool such as a roller or sponge, and application in a form of a stick-shaped solid cosmetic.
- the film formed on a skin surface by the present invention not only has excellent durability but also can make the finish of the skin bright and wholly cover the roughness of the skin texture and the pores by that the fiber spreads over the sulci cutis and the cristae cutis and the powder adheres to the fiber.
- the thickness of the film varies depending on the application amount and is, in a usual use (an application basis weight of 1 mg/cm 2 or more and 3 mg/cm 2 or less), preferably 0.3 ⁇ m or more and 30 ⁇ m or less and more preferably 0.5 ⁇ m or more and 20 ⁇ m or less.
- the thickness is measured after application to a substrate with a contact coating thickness gauge (manufactured by Mitutoyo Corporation, Litematic VL-50A) on the substrate.
- the substrate used here is made of PET.
- the present invention further discloses the following composition, producing method, and film.
- a film-forming composition for skin comprising the following components (A) and (B):
- ⁇ 3> The film-forming composition for skin according to ⁇ 1> or ⁇ 2>, wherein the component (B) has an aspect ratio (average fiber length/average fiber diameter) of 25 or more and 300 or less.
- ⁇ 4> The film-forming composition for skin according to any of ⁇ 1> to ⁇ 3>, wherein the content of the component (A) relative to the whole film-forming composition is 0.5 mass % or more and 98 mass % or less.
- ⁇ 6> The film-forming composition for skin according to any of ⁇ 1> to ⁇ 5>, wherein the component (A) is one or more selected from the group consisting of extender pigments and color pigments and preferably includes a color pigment.
- ⁇ 7> The film-forming composition for skin according to any of ⁇ 1> to ⁇ 6>, wherein the component (A) includes one or more color pigments selected from the group consisting of inorganic color pigments, inorganic white pigments, organic color pigments, organic dyes, and pearl pigments (brilliant powders).
- the component (A) includes one or more color pigments selected from the group consisting of inorganic color pigments, inorganic white pigments, organic color pigments, organic dyes, and pearl pigments (brilliant powders).
- ⁇ 8> The film-forming composition for skin according to any of ⁇ 1> to ⁇ 7>, wherein the component (A) contains a color pigment, and the content of the color pigment in the film-forming composition is 0.1 mass % or more and 60 mass % or less.
- the film-forming composition for skin according to any of ⁇ 1> to ⁇ 9>, wherein the component (B) has an average fiber diameter of 0.2 ⁇ m or more and 5 ⁇ m or less, preferably 0.3 ⁇ m or more and 4 ⁇ m or less, and further preferably 0.3 ⁇ m or more and 3 ⁇ m or less.
- the component (B) is a fiber including one or two or more polymers selected from the group consisting of a completely saponified polyvinyl alcohol that can be insolubilized after film formation, a partially saponified polyvinyl alcohol that can be crosslinked after film formation by using a crosslinking agent together, acrylic resins such as polymethacrylic acid resin, a polyvinylbutyral resin, a polyurethane resin, polylactic acid, an oxazoline-modified silicone such as a poly(N-propanoylethyleneimine) graft-dimethylsiloxane/ ⁇ -aminopropylmethylsiloxane copolymer, polyvinylacetal diethylaminoacetate, and Zein; and is preferably a fiber including one or two or more polymers selected from the group consisting of a polyvinylbutyral resin, an acrylic resin, a
- ⁇ 13> The film-forming composition for skin according to any of ⁇ 1> to ⁇ 12>, wherein the component (B) is a fiber including an (octyl acrylamide/hydroxypropyl acrylate/butylaminoethyl methacrylate) copolymer.
- ⁇ 14> The film-forming composition for skin according to any of ⁇ 1> to ⁇ 13>, wherein the component (B) has an average fiber length of 20 ⁇ m or more and 300 ⁇ m or less, preferably 25 ⁇ m or more and 250 ⁇ m or less, more preferably 30 ⁇ m or more and 200 ⁇ m or less, and further preferably 40 ⁇ m or more and 200 ⁇ m or less.
- ⁇ 15> The film-forming composition for skin according to any of ⁇ 1> to ⁇ 14>, wherein the component (B) has an aspect ratio (average fiber length/average fiber diameter) of 25 or more and 300 or less, preferably 27 or more and 250 or less, and more preferably 30 or more and 200 or less.
- aspect ratio average fiber length/average fiber diameter
- ⁇ 16> The film-forming composition for skin according to any of ⁇ 1> to ⁇ 15>, wherein the CV value of the fiber length of the component (B) is 40% or more and 100% or less, preferably 42% or more and 95% or less, and more preferably 45% or more and 90% or less.
- ⁇ 17> The film-forming composition for skin according to any of ⁇ 1> to ⁇ 16>, wherein the component (B) includes a fiber having an average fiber length of 40 ⁇ m or more, preferably 50 ⁇ m or more.
- the film-forming composition for skin according to any of ⁇ 1> to ⁇ 18>, wherein the content of the component (B) is 0.1 mass % or more and 10 mass % or less, preferably 0.5 mass % or more and 9 mass % or less, more preferably 0.7 mass % or more and 8 mass % or less.
- ⁇ 20> The film-forming composition for skin according to any of ⁇ 1> to ⁇ 19>, wherein the mass ratio of the component (B) to the component (A), (B/A), is 0.02 or more and 0.4 or less, preferably 0.03 or more and 0.35 or less, more preferably 0.05 or more and 0.33 or less, and further preferably 0.1 or more and 0.31 or less.
- ⁇ 21> The film-forming composition for skin according to any of ⁇ 5> to ⁇ 20>, wherein the component (C) is preferably one or more selected from the group consisting of water and oils that are liquid at 20° C.
- ⁇ 22> The film-forming composition for skin according to any of ⁇ 5> to ⁇ 20>, wherein the component (C) is water and one or two or more oils selected from the group consisting of ester oils, ether oils, hydrocarbon oils, higher alcohols, fluorine oils, and nonvolatile silicone oils.
- the component (C) is water and one or two or more oils selected from the group consisting of ester oils, ether oils, hydrocarbon oils, higher alcohols, fluorine oils, and nonvolatile silicone oils.
- a method for producing a film on a skin surface comprising applying the film-forming composition according to any of ⁇ 1> to ⁇ 24> to the skin.
- ⁇ 28> Use of the film-forming composition according to any one of ⁇ 1> to ⁇ 24> for makeup and/or ultraviolet protection by applying the composition to skin, preferably, to the face.
- ⁇ 29> Use of the film-forming composition for skin according to any of ⁇ 1> to ⁇ 24> for producing a powder-containing cosmetic film on a skin surface.
- a production example of a fiber B will be shown.
- An acrylic resin ((octyl acrylamide/hydroxypropyl acrylate/butylaminoethyl methacrylate) copolymer) was dissolved in ethanol to obtain an 18 mass % solution.
- a nanofiber sheet was formed on the surface of a collector using this solution with the device for an electrospinning method shown in FIG. 1 .
- the conditions for manufacturing the nanofiber are as follows: Applied voltage: 30 kV; Capillary-collector distance: 150 mm; Aqueous solution discharge amount: 12 mL/hour; and Environment: 25° C., 30% RH.
- Fibers A and C to F were manufactured as with the fiber B by changing the polymer concentration, rotational speed, and shearing time.
- a production example of a fiber G will be shown.
- An ester resin polylactic acid
- a nanofiber sheet was formed on the surface of a collector, by using this solution with the device for an electrospinning method shown in FIG. 1 .
- the conditions for manufacturing the nanofiber are as follows: Applied voltage: 30 kV; Capillary-collector distance: 150 mm; Aqueous solution discharge amount: 12 mL/hour; and Environment: 25° C., 30% RH.
- the obtained nanofiber sheet was sheared using a dispersion device (manufactured by Pacific Machinery & Engineering Co., Ltd, Milder) at 13500 rpm and circulating 8 times in a circulation line to obtain a fiber.
- a dispersion device manufactured by Pacific Machinery & Engineering Co., Ltd, Milder
- Fiber H was manufactured as in the fiber G by changing the polymer concentration and circulation number.
- Water-in-oil emulsified compositions were obtained by blending the obtained fibers and the components shown in Tables 1 to 4.
- the finish of the base was evaluated by applying the water-in-oil emulsified compositions shown in Tables 1 to 4 to a pore model at 1 mg/cm 2. In addition, the finish when a powdery foundation was applied in the same amount was also evaluated. The evaluation was performed by comparing with the cosmetic of the reference prescription shown in Table 5 as follows. The results are shown in Tables 1 to 4.
- the evaluation criteria were that when a cosmetic of Tables 1 to 4 was superior to the reference prescription, the score is 1 point; and when there was no difference or when a cosmetic of Tables 1 to 4 was inferior to the reference prescription, the score is 0 point. A highest score is 5 points.
- Example 10 Example 1 Example 2 Example 3 Example 4 Fiber F Fiber G Fiber G Fiber H Fiber B Fiber B Fiber (B) Fiber Polymer material Acrylic PLA PLA PLA Acrylic Acrylic Nylon resin resin resin resin Fiber diameter ( ⁇ m) 5 1.5 1.5 10 0.6 0.6 20 Fiber length ( ⁇ m) 50 50 50 50 50 500 Aspect ratio 10.0 33.3 33.3 5.0 83.3 83.3 25.0 Rate of the number of fibers having a fiber length 80.4 40.0 40.0 77.3 54.3 54.3 — of 40 ⁇ m or more (B) Type of fiber Acrylic PLA PLA PLA Acrylic Acrylic Nylon resin resin resin resin resin resin Powder (A) Powder Color Silicone-treated yellow iron oxide 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 phase pigment Silicone-treated red iron oxide 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.03 Silicone-treated black iron oxide 0.001 0.001 0.001 0.001 0.001 0.001 Silicone-treated fine particle zinc oxide 9 9 9 9 9 9 (manufactured by TAY
- MT-500SA Triethoxycaprylylsilane-treated fine particle 4 titanium oxide (manufactured by Sakai Chemical Industry Co., Ltd., STR-100W) Silicone-treated titanium oxide (manufacture 0.56 by ISHIHARA SANGYOU KAISHA, LTD., CR-50, average particle diameter: 0.25 ⁇ m) Extender Silicone-coated talc (JA-68R) 2 pigment Oil (C) Nonvolatile oil Dimethylpolysiloxane KF-96A-1000CS (-G) 5 phase that is liquid at 20° C.
- Octyl p-methoxycinnamate 4 Surfactant Polyether-modified silicone (DOWSIL 2.5 SH3775M FLUID)
- D Volatile oil Dimethylpolysiloxane
- KF-96L-2CS 8.699 Dimethylpolysiloxane
- C Water Purified water 30 phase Other component
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Abstract
A film-forming composition for skin, including components (A) and (B): (A) a powder, and (B) a fiber having an average fiber diameter of 0.1 μm or more and 7 μm or less and an aspect ratio (average fiber length/average fiber diameter) of 20 or more and 300 or less in an amount of 0.1 mass % or more and 10 mass % or less relative to the whole film-forming composition. A mass ratio of the component (B) to the component (A), (B/A), is 0.02 or more and 0.4 or less.
Description
- The present invention relates to a film-forming composition for skin that can form a favorable cosmetic film on a skin surface.
- Techniques for incorporating fibers into cosmetics are well known and are broadly adopted for mascara and so on. In order to make up a keratinous substance, such as skin, a composition containing a fiber and a copolymer including a carboxylate group and a polydimethylsiloxane group in a physiologically acceptable medium (Patent Literature 1) has been reported. A technique of incorporating a fiber in a cosmetic for reducing the irritation of a cosmetic including an irritative component (Patent Literature 2) and a cosmetic including a fiber and an anti-aging agent for camouflaging skin imperfections and treating signs of skin aging (Patent Literature 3) have been also reported. Furthermore, it has been reported to blend a fiber dispersion with a monofilament diameter of 1 to 500 nm and the sum Pa of the monofilament ratio of 60% or more, in order to obtain a blended solution, emulsion, or gel excellent in uniform dispersibility and long-term dispersion stability (Patent Literature 4). Furthermore, a cosmetic containing a short fiber obtained by cutting a hyperfine synthetic fiber having a diameter of about 2 μm into a length of 5 to 50 μm has been reported (Patent Literature 5).
- Patent Literature 1: JP-A-2002-193746
- Patent Literature 2: JP-A-2002-293718
- Patent Literature 3: JP-A-2002-293731
- Patent Literature 4: JP-A-2005-320506
- Patent Literature 5: JP-A-2001-64153
- The present invention relates to a film-forming composition for skin, comprising the following components (A) and (B):
-
- (A) a powder; and
- (B) a fiber having an average fiber diameter of 0.1 μm or more and 7 μm or less and an aspect ratio (average fiber length/average fiber diameter) of 20 or more and 300 or less in an amount of 0.1 mass % or more and 10 mass % or less relative to the whole film-forming composition,
- wherein
- the mass ratio of the component (B) to the component (A), (B/A), is 0.02 or more and 0.4 or less.
- The present invention relates to a method for producing a film on a skin surface, comprising applying the film-forming composition for skin to the skin.
- Furthermore, the present invention relates to a film comprising the film-forming composition for skin.
-
FIG. 1 is a schematic diagram showing a structure of the electrostatic spraying device used for forming a fiber of a component (B). - Since the fiber diameters adopted in Patent Literatures 1 to 3 are large, i.e., 0.9 dtex (=10.7 μm) and the content of fiber is low, no network is formed by the fiber, and thus it causes a problem in the durability of cosmetic films. Since the fiber used in Patent Literature 4 has a long fiber length, the aspect ratio is significantly large, and a film having high durability may not be formed. Further, the aspect ratio of the fiber used in cosmetics disclosed in Patent Literature 5 is too small to form a stable film on skin.
- According to studies by the present inventors, it was found that cosmetics in which a fiber having a large fiber diameter as disclosed in Patent Literatures 1 to 3 and a powder for cosmetics are blended have a problem of making the skin dark and dull, as well as making the roughness of the skin texture and the pore conspicuous.
- Therefore, the present invention provides a film-forming composition for skin that can form a stable film on skin, make the finish of skin bright, and make the roughness of the skin texture and the pores inconspicuous.
- The present inventors conducted various studies to solve the above problems. As a result, they found that a film-forming composition for skin prepared by blending a fine short fiber having a predetermined fiber diameter and aspect ratio and a powder at a predetermined ratio can form a stable film on skin. The fiber spreads over the sulci cutis and the cristae cutis and the powder adheres to the fiber, thereby making the finish of the skin bright and making the roughness of the skin texture and the pore inconspicuous.
- According to the film-forming composition for skin of the present invention, a stable film can be formed on skin. The fiber spreads over the sulci cutis and the cristae cutis and the powder adheres to the fiber, thereby making the finish of skin bright and making the roughness of the skin texture and the pore inconspicuous.
- In addition, the roughness of the skin texture and the pore can be wholly covered by attaching both the film-forming composition for skin of the present invention and powdery foundation to the skin, imparting a smooth finish thereto.
- The film-forming composition for skin of the present invention contains the following components (A) and (B):
-
- (A) a powder; and
- (B) a fiber having an average fiber diameter of 0.1 μm or more and 7 μm or less and an aspect ratio (average fiber length/average fiber diameter) of 20 or more and 300 or less in an amount of 0.1 mass % or more and 10 mass % or less relative to the whole film-forming composition, in
- which
- the mass ratio of the component (B) to the component (A), (B/A), is 0.02 or more and 0.4 or less.
- The powder of the component (A) is a component providing various cosmetic effects to the film formed using the film-forming composition of the present invention on skin. Such a powder (A) is a solid other than the component (B) and can significantly make the finish of skin bright and make the roughness of the skin texture and the pores inconspicuous when used together with the component (B) compared when it is used as an ordinary powder-containing cosmetic or when it is used together with a conventional fiber having a large fiber diameter.
- The powder of the component (A) is not particularly limited as long as it is a powder for cosmetics, and a color pigment or an extender pigment can be used. Among them, from the viewpoint of obtaining an excellent makeup effect, it is preferable to contain a color pigment. Here, examples of the color pigment (A1) include an inorganic color pigment, an inorganic white pigment, an organic color pigment, and an organic dye and also include a pearl pigment (brilliant powder).
- Examples of the inorganic color pigment contained in the present invention composition specifically include inorganic color pigments, such as red iron oxide, iron hydroxide, iron titanate, yellow iron oxide, black iron oxide, carbon black, Prussian blue, ultramarine blue, Prussian blue titanium oxide, black titanium oxide, a titanium/titanium oxide sintered product, manganese violet, cobalt violet, chromium oxide, chromium hydroxide, cobalt oxide, and cobalt titanate. Examples of the inorganic white pigment include titanium oxide, zinc oxide, calamine, zirconium oxide, magnesium oxide, cerium oxide, aluminum oxide, and composites thereof.
- One or two or more of these pigments can be used.
- Among them, preferred are at least one or two or more selected from the group consisting of iron oxide, titanium oxide, and zinc oxide, and more preferred one or two or more selected from the group consisting of titanium oxide, zinc oxide, red iron oxide, yellow iron oxide, and black iron oxide.
- Examples of the organic color pigment and organic dye include organic tar pigments, such as Red No. 3, Red No. 102, Red No. 104, Red No. 106, Red No. 201, Red No. 202, Red No. 204, Red No. 205, Red No. 220, Red No. 226, Red No. 227, Red No. 228, Red No. 230, Red No. 401, Red No. 405, Red No. 505, Orange No. 203, Orange No. 204, Orange No. 205, Yellow No. 4, Yellow No. 5, Yellow No. 401, Blue No. 1, and Blue No. 404; and organic dyes, such as β-carotene, caramel, and a paprika dye. In addition, the examples include those coated with polymers such as cellulose or polymethacrylate ester.
- Examples of the pearl pigment (brilliant powder) include fish scale foil, titanium oxide-coated mica (mica titanium), bismuth oxychloride, titanium oxide-coated bismuth oxychloride, titanium oxide-coated talc, titanium oxide-coated colored mica, titanium oxide/iron oxide-coated mica, fine particle titanium oxide-coated mica titanium, fine particle zinc oxide-coated mica titanium, organic pigment-treated mica titanium, low-order titanium oxide-coated mica, titanium oxide-coated synthetic mica, titanium oxide-coated plate-like silica, hollow plate-like titanium oxide, iron oxide-coated mica, plate-like iron oxide (MIO), aluminum flake, stainless steel flake, titanium oxide-coated plate-like alumina, glass flake, titanium oxide-coated glass flake, pearl shell, gold foil, a gold-deposited resin film, and a metal-deposited resin film. One or two or more of them can be used.
- Examples of the extender pigment include inorganic extender pigments and organic extender pigments.
- Examples of the inorganic extender pigment include barium sulfate, calcium sulfate, magnesium sulfate, magnesium carbonate, calcium carbonate, talc, mica, kaolin, sericite, silicic acid, silicic anhydride, aluminum silicate, magnesium silicate, magnesium aluminum silicate, calcium silicate, barium silicate, strontium silicate, metal tungstate, hydroxyapatite, vermiculite, clay, bentonite, montmorillonite, hectorite, smectite, zeolite, ceramic powder, dicalcium phosphate, alumina, silica, aluminum hydroxide, boron nitride, synthetic mica, synthetic sericite, metallic soap, and barium sulfate-treated mica. One or two or more of them can be used.
- Examples of the organic extender pigment include a silicone rubber powder, a silicone resin-coated silicone rubber powder, polymethylsilsesquioxane, a polyamide powder, a nylon powder, a polyester powder, a polypropylene powder, a polystyrene powder, a polyurethane powder, a vinyl resin powder, a urea resin powder, a phenolic resin powder, a fluorine resin powder, a silicone resin powder, an acrylic resin powder, a melamine resin powder, a polycarbonate resin, a divinylbenzene/styrene copolymer, a silk powder, a wool powder, a cellulose powder, a long-chain alkyl phosphate metal salt, N-mono (long-chain) alkylacyl basic amino acid, and composites thereof. One or two or more of them can be used.
- Composite powders of the inorganic powder and the organic powder can also be used.
- The particle diameter of the powder is preferably 0.01 μm or more and 500 μm or less, more preferably 0.02 μm or more and 100 μm or less, further preferably 0.03 μm or more and 10 μm or less, and even more preferably 0.03 μm or more and 2 μm or less.
- Examples of the shape of the powder include spherical, plate-like, granular, and amorphous. In the plate-like shape here, the aspect ratio (average length/average thickness) is preferably less than 20, more preferably less than 15, and further preferably less than 10.
- The powders can also be used after hydrophobic treatment, and one or two or more of these powders hydrophobized can also be used. The hydrophobic treatment is not limited as long as it is treatment that is applied to ordinary powders for cosmetics, and may be performed using a surface treatment agent such as a silicone compound, an alkylsilane, metal soap, an amino acid compound, lecithin, organic titanate, a fluorine compound, an acrylic resin, a methacrylic resin, or a urethane resin by dry treatment, wet treatment, or the like.
- As the hydrophobic treatment, preferred are surface treatment, for example, treatment with a silicone compound such as dimethylpolysiloxane, methyl hydrogen polysiloxane, cyclic silicone, or one-terminal or both-terminal trialkoxy group-modified organopolysiloxane; treatment with an alkylsilane such as methyltrimethoxysilane, ethyltrimethoxysilane, hexyltrimethoxysilane, caprylyl trimethoxysilane, or caprylyl triethoxysilane; treatment with metal soap such as aluminum stearate, aluminum myristate, zinc stearate, or magnesium stearate; treatment with an amino acid compound such as proline, hydroxyproline, alanine, glycine, sarcosine, glutamic acid, aspartic acid, lysine, or a derivative thereof; lecithin treatment; treatment with an organic titanate such as isopropyl titanium triisostearate; treatment with a fluorine compound such as perfluoroalkyl alkoxysilane, fluorine-modified silicone, perfluoropolyether, or perfluoroalkyl phosphate; and acrylic resin treatment, methacrylic resin treatment, and urethane resin treatment. In particular, powders surface-treated with a silicone compound, an alkylsilane, or an amino acid compound are more preferable.
- The content of the component (A) powder in the present invention film-forming composition for skin is preferably 0.5 mass % or more, more preferably 1 mass % or more, and further preferably 5 mass % or more from the viewpoint of improving the durability of the film and the viewpoint of making the finish of skin bright where the film is formed and being capable of making the roughness of the skin texture and the pores inconspicuous. In addition, from the same viewpoint, the content is preferably 94 mass % or less, more preferably 60 mass % or less, further preferably 50 mass % or less, and even more preferably 40 mass % or less.
- The component (A) powder preferably contains a color pigment (A1) as described above, and the content of the color pigment in the film-forming composition for skin of the present invention is preferably 0.1 mass % or more and 60 mass % or less from the viewpoint of obtaining an excellent makeup effect. The content is more preferably 0.3 mass % or more, further preferably 1 mass % or more and is more preferably 50 mass % or less, further preferably 40 mass % or less, and preferably 30 mass % or less.
- The content mass ratio of the color pigment (A1) to the component (A), (A1/A), is preferably 0.3 or more, more preferably 0.4 or more, and further preferably 0.5 or more. In addition, from the same viewpoint, the mass ratio is preferably 1 or less, more preferably 0.95 or less, and further preferably 0.9 or less.
- The component (B) is a fiber having an average fiber diameter 0.1 μm or more and 7 μm or less and an aspect ratio (average fiber length/average fiber diameter) of 20 or more and 300 or less. The component (B) can forms a network in the formed film, provides durability to the film, makes the finish of skin bright where the film is formed, and makes the roughness of the skin texture and the pores inconspicuous. The component (B) is present as a solid in the film-forming composition.
- Incidentally, whether a fiber forms a network in the film or not can be verified by using a scanning electron microscope (SEM). The network is a state that fibers dispersed in the film have intersections with each other to have gaps between the fibers and is a state that the component contained in the film-forming composition is retained in the gaps. The intersection of fibers is preferably a state that, for example, one fiber has two or more intersections with other two or more fibers, and the fibers are involved with each other.
- The average fiber diameter is generally the diameter of a cross-section of a fiber. Here, when the cross-section of a fiber is a circle, the fiber diameter is the diameter of the circle, and when the cross-section is an ellipse, the fiber diameter is the longitudinal diameter of the ellipse. The average fiber diameter of the fiber used in the present invention is 0.1 μm or more and 7 μm or less from the viewpoint of improving the followability of the fiber to the skin in the formed film and improving the durability and the viewpoint of making the finish of skin bright where the film is formed and making the roughness of the skin texture and the pores inconspicuous.
- The average fiber diameter is preferably 0.2 μm or more and more preferably 0.3 μm or more from the viewpoint of improving the durability and the viewpoint of making the finish of skin bright where the film is formed and making the roughness of the skin texture and the pores inconspicuous.
- The average fiber diameter is preferably 5 μm or less, more preferably 4 μm or less, and further preferably 3 μm or less from the viewpoint of improving the durability and the viewpoint of making the finish of skin bright where the film is formed and making the roughness of the skin texture and the pores inconspicuous.
- The average fiber diameter can be measured by observing fibers with an SEM at a magnification of 2000 times or 5000 times, arbitrarily selecting, from the two-dimensional image, 100 fibers excluding defects (e.g., clumps of fibers and crossing parts of fibers), drawing a line perpendicular to the longitudinal direction of each of the fibers, and directly reading the fiber diameters. The arithmetic average of these measured values is determined as the average fiber diameter. Since the fibers are dispersed in the film-forming composition, the film-forming composition is thinly applied to a substrate, and measurement by SEM observation is performed.
- The length of the fiber is preferably 20 μm or more and 300 μm or less as the average fiber length from the viewpoint of a length of facilitating network formation and improving the durability of the formed film by the network and the viewpoint of making the finish of skin bright where the film is formed and making the roughness of the skin texture and the pores inconspicuous.
- The average fiber length is more preferably 25 μm or more, further preferably 30 μm or more, and further preferably 40 μm or more from the viewpoint of facilitating network formation and the viewpoint of making the finish of skin bright where the film is formed and making the roughness of the skin texture and the pores inconspicuous.
- The average fiber length is more preferably 250 μm or less and further preferably 200 μm or less from the viewpoint of suppressing tangles and twists between fibers at the time of application of the composition and the viewpoint of making the finish of skin bright where the film is formed and making the roughness of the skin texture and the pores inconspicuous.
- The average fiber length can be measured by observing fibers with an SEM at a magnification of 250 times to 750 times according to the length of the fibers, arbitrarily selecting, from the two-dimensional image, 100 fibers excluding defects (e.g., clumps of fibers and crossing parts of fibers), drawing a line in the longitudinal direction of each of the fibers, and directly reading the fiber lengths. The arithmetic average of these measured values is determined as the average fiber length.
- The aspect ratio of the fiber (average fiber length)/(average fiber diameter) is preferably 20 or more and 300 or less from the viewpoint of the durability of the film by forming a uniform network and the viewpoint of making the finish of skin bright where the film is formed and making the roughness of the skin texture and the pores inconspicuous.
- The aspect ratio is more preferably 25 or more, further preferably 27 or more, and further preferably 30 or more from the viewpoint of the durability of the film and the viewpoint of making the finish of skin bright where the film is formed and making the roughness of the skin texture and the pores inconspicuous.
- The aspect ratio is more preferably 250 or less and further preferably 200 or less from the viewpoint of the durability of the film and the viewpoint of making the finish of skin bright where the film is formed and making the roughness of the skin texture and the pores inconspicuous.
- The CV (coefficient of variation) value of the fiber length of the component (B) is preferably 40% or more and 100% or less from the viewpoint that the fiber forms a network in the film.
- The CV value is more preferably 42% or more and further preferably 45% or more from the viewpoint of facilitating network formation and the viewpoint of making the finish of skin bright where the film is formed and making the roughness of the skin texture and the pores inconspicuous.
- The CV value is preferably 95% or less and further preferably 90% or less from the viewpoint of enhancing the storage stability of the composition.
- The CV value is calculated from the measured values obtained by the above-described fiber length-measuring method by the expression: (standard deviation of measured fiber lengths)/(average fiber length)×100 (%).
- The fiber of the component (B) preferably includes a fiber having a fiber length of 40 μm or more and more preferably a fiber having a fiber length of 50 μm or more from the viewpoint of forming a strong network in the film and enhancing the durability of the obtained film and the viewpoint of making the finish of skin bright where the film is formed and making the roughness of the skin texture and the pores inconspicuous.
- In the fiber of the component (B), the rate of the number of fibers having a fiber length of 40 μm or more to the total fibers is preferably 5% or more and 100% or less from the viewpoint of forming a strong network in the film and enhancing the durability of the obtained film and the viewpoint of making the finish of skin bright where the film is formed and making the roughness of the skin texture and the pores inconspicuous. The fibers having a length of 40 μm or more is more preferably contained at a rate of 8% or more and 100% or less and is further preferably contained at a rate of 15% or more and 100% or less from the viewpoint of further improving the durability and the viewpoint of making the finish of skin bright where the film is formed and making the roughness of the skin texture and the pores inconspicuous.
- This rate of the number of fibers is measured by adjusting the magnification of the SEM within ×200 to ×750 according to the fiber length such that 20 to 30 fibers are present in one imaging screen of the SEM and, in this state, measuring the fiber lengths of all fibers in the image for eliminating arbitrariness. The measurement is performed for 200 or more fibers in total.
- The fiber of the component (B), i.e., the fiber of a water-insoluble polymer, can be manufactured by obtaining a fiber from a fiber-forming polymer by various known spinning technologies and subjecting the fiber for shortening treatment. Here, the fiber-forming polymer is usually a thermoplastic or solvent-soluble chain polymer molecule.
- The fiber-forming polymer is preferably a thermoplastic resin and more preferably a thermoplastic resin having a weight-average molecular weight of 1.0×104 g/mol or more and 2.0×105 g/mol or less.
- As the fiber-forming polymer, a water-insoluble polymer is preferably used for maintaining the form of the fiber in a film-forming agent. The spinning method is preferably an electrospinning method for efficiently obtaining a fiber having a small fiber diameter. Specifically, solution spinning and melt spinning are mentioned.
- The term “fiber of a water-insoluble polymer” refers to a fiber having a property that when 1 g of the fiber is weighed in an environment of 23° C. and 1 atm and is then immersed in 10 g of deionized water for 24 hours, the dissolved amount of the immersed fiber does not exceed 0.5 g.
- Examples of the water-insoluble polymer include a completely saponified polyvinyl alcohol that can be insolubilized after film formation; a partially saponified polyvinyl alcohol that can be crosslinked after film formation by using a crosslinking agent together; oxazoline-modified silicone, such as a poly(N-propanoylethyleneimine) graft-dimethylsiloxane/γ-aminopropylmethylsiloxane copolymer; biodegradable resins, such as polyvinylacetal diethylaminoacetate, zein (major component of corn protein), polylactic acid (PLA), polybutylene succinate, polyglycolic acid, polycaprolactone, and polyhydroxy alkanoic acid; polyester resins, such as polyethylene terephthalate (PET) and polybutylene terephthalate; acrylic resins, such as a polyacrylonitrile resin and a polymethacrylic acid resin; and a polystyrene resin, a polyvinylbutyral resin, a polyvinylacetal resin, a polyurethane resin, a polyamide resin, a polyimide resin, a polyamideimide resin, a polypropylene resin, a polyethylene resin, and various polypeptides (e.g., collagen, gelatin, fibrin, and casein). These water-insoluble polymers can be used singly or in combinations of two or more thereof.
- Among these water-insoluble polymers, it is preferable to use one or two or more selected from the group consisting of a completely saponified polyvinyl alcohol that can be insolubilized after film formation, a partially saponified polyvinyl alcohol that can be crosslinked after film formation by using a crosslinking agent together, a polymethacrylic acid resin and other acrylic resins, a polyvinylacetal resin, a polyurethane resin, polylactic acid, an oxazoline-modified silicone such as a poly(N-propanoylethyleneimine) graft-dimethylsiloxane/γ-aminopropylmethylsiloxane copolymer, polyvinylacetal diethylaminoacetate, and zein.
- Among them, from the viewpoint of the ease in formation of nanofibers, more preferred are one or two or more selected from the group consisting of a polyvinylbutyral resin, an acrylic resin, a polypropylene resin, a polyester such as polylactic acid, and a polyurethane resin.
- The acrylic resin is preferably an (octyl acrylamide/hydroxypropyl acrylate/butylaminoethyl methacrylate) copolymer.
- In addition, it is also preferable from the viewpoint of the reduction in environmental load to use a biodegradable resin such as polylactic acid, polybutylene succinate, polyglycolic acid, polycaprolactone, and polyhydroxy alkanoic acid. In the present specification, the term “biodegradability” means that the degree of biodegradation of a polyester measured in accordance with JIS K6953-1 is 30% or more.
- Examples of the means for fiber shortening treatment include cutting, shearing, crushing, pulverizing, disintegrating, and defibrating. For example, it is possible to use an impact crusher such as a mechanical vortex crusher or a hammer crusher, a jet grinder such as a jet mill, a medium grinder such as a ball mill or a rod mill, a dry grinder such as a cutter mill grinder or a disc mill grinder, a media grinder using a liquid medium, a wet grinder using a medialess grinder, or a combination thereof.
- In more preferred means for shortening fibers, a fiber assembly in which nanofibers are entangled, e.g., nonwoven fabric, is manufactured, the fiber assembly is then cut into an appropriate size, and then a mechanical vortex grinder, a cutter mill grinder, a disc mill grinder, a wet high-speed shear medialess grinder, or a wet high-pressure shear medialess grinder is used. Examples of the fiber assembly include, in addition to nonwoven fabric, those having a prescribed thickness, such as flocculate.
- The content of the component (B) in the present invention composition is 0.1 mass % or more and 10 mass % or less relative to the whole film-forming composition from the viewpoint of the durability of the formed film and the ease in formation of a fiber network and the viewpoint of making the finish of skin bright where the film is formed and making the roughness of the skin texture and the pores inconspicuous.
- The content is preferably 0.5 mass % or more and more preferably 0.7 mass % or more from the viewpoint of the durability of the film and the ease in formation of a fiber network and the viewpoint of making the finish of skin bright where the film is formed and making the roughness of the skin texture and the pores inconspicuous.
- In addition, from the viewpoint of forming a stable composition, the content is preferably 9 mass % or less and further preferably 8 mass % or less.
- The content of the component (B) relative to the whole film-forming composition can be determined as follows. Firstly, a fiber of a water-insoluble polymer recognized by the above-described definition of a water-insoluble polymer is obtained from the fibers contained in the composition. Secondly, the fiber is washed with a solvent in which the fiber is insoluble, and only the fiber of a water-insoluble polymer is obtained through filtration. When the resin contained in the component (B) is an ester resin such as PLA, the solvent is preferably ethanol. When the resin is acrylic, the solvent is preferably water. The obtained fiber of a water-insoluble polymer can be measured to determine the mass. The rate relative to the mass of the composition before the washing, i.e., the whole film-forming composition, can be determined by (component (B) mass after washing)/(mass of composition before washing)×100(%).
- The mass ratio of the component (B) to the component (A), (B/A), in the present invention composition is 0.02 or more and 0.4 or less from the viewpoint of the durability of the film and the ease in formation of a fiber network and the viewpoint of making the finish of skin bright where the film is formed and making the roughness of the skin texture and the pores inconspicuous.
- The mass ratio (B/A) is preferably 0.03 or more, more preferably 0.05 or more, and further preferably 0.1 or more from the viewpoint of the durability of the film and the ease in formation of a fiber network and the viewpoint of making the finish of skin bright where the film is formed and making the roughness of the skin texture and the pores inconspicuous.
- The mass ratio (B/A) is preferably 0.35 or less from the viewpoint of the durability of the film and the ease in formation of a fiber network and the viewpoint of making the finish of skin bright where the film is formed and making the roughness of the skin texture and the pores inconspicuous and is more preferably 0.33 or less and further preferably 0.31 or less from the viewpoint of making the finish of skin bright where the film is formed and making the roughness of the skin texture and the pores inconspicuous.
- In the composition of the present invention, in order to form a network in the formed film and improve the durability of the film, it is preferable that the (average fiber diameter)2/fiber content (μm2/mass %) is within a range of 0.005 or more and 7 or less. The fiber content means the mass % of the fiber in the film-forming composition.
- This value is preferably 0.02 or more, more preferably 0.03 or more, and further preferably 0.05 or more from the viewpoint of sufficiently forming a uniform network of the fiber.
- Considering the practical blending amount, the value is preferably 6 or less, more preferably 5 or less, and further preferably 4 or less.
- This value, i.e., (average fiber diameter)2/fiber content (μm2/mass %), is an index of the cumulative length of the fiber included in the composition and means that the larger this value, the shorter the cumulative length.
- The present invention composition preferably contains a liquid material (component (C)) selected from the group consisting of water and nonvolatile oils that are liquid at 20° C. as a dispersion medium of the component (B) in order to facilitate the formation of a network of the fiber of the component (B) in the film formed on skin when the present invention composition is applied to the skin.
- Thus, in the present invention film-forming composition, since the component (B) is present dispersed or dissolved in the component (C), it becomes easy to form a network of the fiber of the component (B).
- The component (C) is a liquid material selected from the group consisting of water and nonvolatile oils that are liquid at 20° C. Examples of the component (C) include water and one or two or more oils selected from the group consisting of ester oils, ether oils, hydrocarbon oils, higher alcohols, fluorine oils, and nonvolatile silicone oils. In the present invention, they are preferably used singly or in combinations of two or more thereof. The volatile oil in the present invention is an oil having a vapor pressure at 20° C. of 0.01 kPa or more and 106.66 kPa or less, and the nonvolatile oil is an oil that is liquid at 20° C. other than the volatile oils.
- As the ester oil, it is possible to use one or two or more selected from the group consisting of esters consisting of linear or branched fatty acid and linear or branched alcohol or polyhydric alcohol and triglycerol fatty acid esters (triglycerides).
- Specifically, it is possible to used one or two or more selected from the group consisting of isopropyl myristate, cetyl octanoate, octyldodecyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate, myristyl myristate, decyl oleate, hexyldecyl dimethyloctanoate, cetyl lactate, myristyl lactate, lanolin acetate, isocetyl stearate, isocetyl isostearate, isononyl isononanoate, isotridecyl isononanoate, cholesteryl 12-hydroxystearate, ethylene glycol di-2-ethylhexanoate, dipentaerythritol fatty acid ester, n-alkyl glycol monoisostearate, neopentyl glycol dicaprate, diisostearyl malate, glyceryl di-2-heptylundecanoate, trimethylolpropane tri-2-ethylhexanoate, trimethylolpropane triisostearate, pentaerythrityl tetra-2-ethylhexanoate, glyceryl tri-2-ethylhexanoate, trimethylolpropane triisostearate, cetyl 2-ethylhexanoate, 2-ethylhexyl palmitate, diethylhexyl naphthalenedicarboxylate, C12-15 alkyl benzoate, cetearyl isononanoate, glyceryl tri(caprylate/caprate), butylene glycol (dicaprylate/caprate), glyceryl trilaurate, glyceryl trimyristate, glyceryl tripalmitate, glyceryl triisostearate, glyceryl tri-2-heptylundecanoate, glyceryl tribehenate, tricoconut oil fatty acid glyceryl ester, castor oil fatty acid methyl ester, oleyl oleate, 2-heptylundecyl palmitate, diisobutyl adipate, N-lauroyl-L-glutamic acid-2-octyldodecyl ester, di-2-heptylundecyl adipate, ethyl laurate, di-2-ethylhexyl sebacate, 2-hexyldecyl myristate, 2-hexyldecyl palmitate, 2-hexyldecyl adipate, diisopropyl sebacate, di-2-ethylhexyl succinate, triethyl citrate, ethylhexyl para-methoxycinnamate, and tripropylene glycol dipivalate.
- Among them, from the viewpoint of the durability of the formed film, the viewpoint of the ease in formation of a fiber network, and the viewpoint of making the finish of skin bright where the film is formed and making the roughness of the skin texture and the pores inconspicuous, preferred are at least one selected from the group consisting of octyldodecyl myristate, myristyl myristate, isocetyl stearate, isocetyl isostearate, cetearyl isononanoate, diisobutyl adipate, di-2-ethylhexyl sebacate, isopropyl myristate, isopropyl palmitate, diisostearyl malate, neopentyl glycol dicaprate, isononyl isononanoate, isotridecyl isononanoate, glyceryl tri(caprylate/caprate), isopropyl myristate, and ethylhexyl para-methoxycinnamate, and it is more preferable to include one or two or more selected from the group consisting of diisostearyl malate, neopentyl glycol dicaprate, isononyl isononanoate, isotridecyl isononanoate, glyceryl tri(caprylate/caprate), isopropyl myristate, and ethylhexyl para-methoxycinnamate.
- Examples of the ether oil include alkyl-1,3-dimethylbutyl ether such as cetyl dimethylbutyl ether, ethylene glycol dioctyl ether, glycerol monooleyl ether, and dicaprylyl ether, and one or two or more selected therefrom can be used.
- Examples of the hydrocarbon oil include hydrocarbon oils that are liquid at 20° C., such as liquid paraffin, squalane, squalene, polyisobutene (pentamer or higher), and liquid isoparaffin.
- Examples of the higher alcohol include higher alcohols having from 12 to 20 carbon atoms, specifically, lauryl alcohol, isostearyl alcohol, oleyl alcohol, and octyldodecanol, and one or two or more selected therefrom can be used.
- Furthermore, animal and vegetable oils including the above-mentioned ester oils and hydrocarbon oils can be used. Examples of the animal and vegetable oil include olive oil, jojoba oil, macadamia nut oil, meadowfoam oil, castor oil, safflower oil, sunflower oil, avocado oil, canola oil, apricot kernel oil, rice germ oil, and rice bran oil.
- Examples of the silicone oil include dimethylpolysiloxane (5 cs or more), polyether-modified silicone, amino-modified silicone, carboxy-modified silicone, methylphenylpolysiloxane, fatty acid-modified silicone, alcohol-modified silicone, aliphatic alcohol-modified silicone, epoxy-modified silicone, fluorine-modified silicone, cyclic silicone, and alkyl-modified silicone. As the silicone oil, it is preferable to use at least dimethylpolysiloxane (5 cs or more).
- Examples of the fluorine oil include perfluorodecaline, perfluoroadamantane, perfluorobutyl tetrahydrofuran, perfluorooctane, perfluorononane, perfluoropentane, perfluorodecane, perfluorododecane, and per fluoropolyether.
- The content of the component (C) in the present invention composition is preferably 5 mass % or more, more preferably 10 mass % or more, further preferably 15 mass % or more, and even more preferably 20 mass % or more considering the practical blending amount from the viewpoint of the dispersibility of the component (B) and the durability of the formed film.
- In addition, considering the practical blending amount, the content is preferably 98 mass % or less, more preferably 90 mass % or less, further preferably 70 mass % or less, and even more preferably 50 mass % or less.
- The content and skeletal structure of the component (C) can be identified by specifying the molecular structure by a known technology, such as NMR (nuclear magnetic resonance apparatus), chromatography, or IR analysis, or a combination thereof. The content of the component (C) can be measured by the measurement method above, for example, based on the intensity of the measured value of the portion showing the skeletal structure.
- The content of water (C1) of the component (C) in the film-forming composition is preferably 1 mass % or more, more preferably 5 mass % or more, further preferably 10 mass % or more, and even more preferably 15 mass % or more and is preferably 98 mass % or less, more preferably 90 mass % or less, further preferably 70 mass % or less, and even more preferably 50 mass % or less from the viewpoint of the durability of the film, the viewpoint of the ease in formation of a fiber network, and the viewpoint of making the finish of skin bright where the film is formed and making the roughness of the skin texture and the pores inconspicuous.
- The mass ratio of the component (C1) to the component (C), (C1)/(C), is preferably 0.4 or more, more preferably 0.5 or more, further preferably 0.6 or more, and even more preferably 0.7 or more and is preferably 0.96 or less, more preferably 0.9 or less, further preferably 0.85 or lee, and even more preferably 0.8 or less from the viewpoint of film formation and the durability of the film, the viewpoint of the ease in formation of a fiber network, and the viewpoint of forming a film excellent in scratch resistance.
- The film-forming composition for skin of the present invention can further contain an oil other than the component (C), a volatile component, a surfactant, a polyol that is liquid at 20° C., a preservative, a moisturizing agent, an ultraviolet absorber, a water-soluble polymer, an amino acid, a dye, and so on.
- The oil other than the component (C) is not limited as long as it is solid or semisolid at 20° C. and is used in ordinary cosmetics, and examples thereof include mineral-based waxes such as ozokerite and ceresin; petroleum waxes such as paraffin and microcrystalline wax; synthetic hydrocarbons such as Fischer-Tropsch wax, polyethylene wax, and synthetic hydrocarbon wax; vegetable waxes such as carnauba wax, candelilla wax, rice wax, sunflower wax, and highly hydrogenated jojoba oil; animal waxes such as beeswax Chinese wax, and whale wax; and synthetic waxes such as silicone wax and synthetic beeswax.
- Examples of the volatile component (D) include alcohols, ketones, volatile silicone oils, and volatile hydrocarbon oils, and preferred are one or more selected from the group consisting of alcohols, volatile silicone, and volatile hydrocarbon oils. The volatile component is a material having volatility in the liquid state. The volatile material has a vapor pressure at 20° C. of 0.01 kPa or more and 106.66 kPa or less.
- As the volatile alcohol, for example, a monovalent chain aliphatic alcohol, a monovalent cyclic aliphatic alcohol, or a monovalent aromatic alcohol is suitably used. Examples of the monovalent chain aliphatic alcohol include C1-C6 chain alcohols, examples of the monovalent cyclic aliphatic alcohol include C4-C6 cyclic alcohols, and examples of the monovalent aromatic alcohol include benzyl alcohol and phenylethyl alcohol. Specific examples thereof include ethanol, isopropyl alcohol, butyl alcohol, phenylethyl alcohol, n-propanol, and n-pentanol. From the viewpoint of use impression, ethanol is preferable. These alcohols can be used alone or in combination of two or more.
- Examples of the volatile silicone oil include linear dimethylpolysiloxanes, such as hexamethyldisiloxane (dimethylpolysiloxane (0.65 cs)), octamethyltrisiloxane (dimethylpolysiloxane (1 cs)), dimethylpolysiloxane (1.5 cs), and dimethylpolysiloxane (2 cs); branched siloxanes, such as methyl trimethicone, tris(trimethylsilyl)methylsilane, and tetrakis(trimethylsilyl)silane; and cyclic dimethylsiloxanes, such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexasiloxane.
- Among them, from the viewpoint of excellent use impression and finish, preferred are linear dimethylpolysiloxanes and branched siloxane, and it is more preferable to include one or two or more selected from the group consisting of hexamethyldisiloxane (dimethylpolysiloxane (0.65 cs)), octamethyltrisiloxane (dimethylpolysiloxane (1 cs)), dimethylpolysiloxane (1.5 cs), dimethylpolysiloxane (2 cs), and methyl trimethicone, further preferable to at least include one or two or more selected from the group consisting of hexamethyldisiloxane (dimethylpolysiloxane (0.65 cs)), octamethyltrisiloxane (dimethylpolysiloxane (1 cs)), and methyl trimethicone, and even more preferable to at least include one or two or more selected from the group consisting of hexamethyldisiloxane (dimethylpolysiloxane (0.65 cs)), and octamethyltrisiloxane (dimethylpolysiloxane (1 cs)).
- Examples of the volatile hydrocarbon oil include paraffin-based hydrocarbon oils, such as n-decane, n-undecane, and n-dodecane; isoparaffin-based hydrocarbon oils, such as isodecane, isododecane, and hydrogenated polyisobutene; and cyclic paraffin hydrocarbon oils, such as cyclodecane and cyclododecane. Among them, from the viewpoint of excellent use impression and suppressing uneven attachment of the finish, preferred are isoparaffin-based hydrocarbon oils, more preferred are isoparaffin-based hydrocarbon oils having from 8 to 16 carbon atoms, further preferred are isoparaffin-based hydrocarbon oils having from 10 to 16 carbon atoms, and it is even more preferable to at least include isododecane.
- As the volatile oil, it is preferable to include one or two or more selected from the group consisting of isododecane and dimethylpolysiloxane having a kinematic viscosity at 25° C. of 2 cSt or less from the viewpoint of excellent use impression and finish. Incidentally, the kinematic viscosity can be measured using, for example, an Ubbelohde viscometer.
- The content of the volatile component in the present invention composition is preferably 1 mass % or more relative to the whole film-forming composition, more preferably 10 mass % or more, further preferably 25 mass % or more and preferably 60 mass % or less, more preferably 50 mass % or less, and further preferably 45 mass % or less from the viewpoint of the durability of the formed film and the ease in formation of a fiber network and the viewpoint of making the finish of skin bright where the film is formed and making the roughness of the skin texture and the pores inconspicuous.
- Examples of the surfactant include nonionic surfactants, anionic surfactants, and cationic surfactants, and particularly preferred are nonionic surfactants, such as a polyoxyethylene/methylpolysiloxane copolymer, a poly(oxyethylene/oxypropylene)methylpolysiloxane copolymer, crosslinked polyether-modified silicone, crosslinked alkylpolyether-modified silicone, cetyl dimethicone copolyol, sorbitan monooleate, glyceryl stearate, polyoxyethylene hydrogenated castor oil, polyoxyethylene alkyl ether, sorbitan sesquioleate, and diglyceryl monooleate. These surfactants may be used singly or in combinations of two or more thereof.
- The content of the surfactant in the present invention composition is preferably 0.01 mass % or more relative to the whole film-forming composition, more preferably 0.1 mass % or more, and further preferably 0.3 mass % or more and preferably 10 mass % or less, more preferably 5 mass % or less, and further preferably 3 mass % or less from the viewpoint of the durability of the formed film and the ease in formation of a fiber network and the viewpoint of making the finish of skin bright where the film is formed and making the roughness of the skin texture and the pores inconspicuous.
- Examples of the polyol that is liquid at 20° C. include alkylene glycols, such as ethylene glycol, propylene glycol, 1,3-propanediol, and 1,3-butanediol; polyalkylene glycols, such as diethylene glycol, dipropylene glycol, and polyethylene glycol and polypropylene glycol each having a weight-average molecular weight of 2000 g/mol or less; and glycerins, such as glycerin, diglycerin, and triglycerin.
- Among them, preferred are ethylene glycol, propylene glycol, 1,3-butanediol, dipropylene glycol, polyethylene glycol having a weight-average molecular weight of 2000 g/mol or less, glycerin, and diglycerin; more preferred are propylene glycol, 1,3-butanediol, and glycerin; and further preferred are propylene glycol and 1,3-butanediol.
- Examples of the form of the composition of the present invention include oily cosmetics and emulsified cosmetics, specifically, oily cosmetics, water-in-oil emulsified cosmetics, and oil-in-water emulsified cosmetics. In particular, emulsified cosmetics are preferable, and water-in-oil emulsified cosmetics are more preferable. The composition of the present invention can be manufactured by heating the components as needed and mixing them according to a usual method.
- The film-forming composition for skin of the present invention can be applied as, for example, makeup cosmetics, such as a makeup base, a foundation, a concealer, a blusher, an eyeshadow, a mascara, an eyeliner, an eyebrow, an overcoat agent, and a lipstick; ultraviolet protection cosmetics, such as a sunscreen emulsion and a sunscreen cream; and skincare cosmetics, such as a lotion, an emulsion, a cream, a serum, and a facial mask and is suitable as a makeup cosmetic or an ultraviolet protection cosmetic.
- The composition of the present invention is a film-forming composition for skin and can form a uniform film on a skin surface by being applied to the skin. In this film, the fiber forms a network, as a result, the obtained film has excellent durability. The fiber spreads over the sulci cutis and the cristae cutis, and the powder adheres to the fiber. Consequently, the finish of the skin is brightened, and the roughness of the skin texture and the pores can be wholly covered. In addition, when the film-forming composition for skin of the present invention is attached to the skin together with a powdery foundation, the roughness of the skin texture and the pores can be wholly covered, and a smooth finish is obtained.
- A powder-containing cosmetic film excellent in durability can be formed on a skin surface by applying the composition of the present invention to the skin. Examples of means for applying the composition to the skin include finger application, spray application, application using a tool such as a roller or sponge, and application in a form of a stick-shaped solid cosmetic.
- The film formed on a skin surface by the present invention not only has excellent durability but also can make the finish of the skin bright and wholly cover the roughness of the skin texture and the pores by that the fiber spreads over the sulci cutis and the cristae cutis and the powder adheres to the fiber.
- Here, the thickness of the film varies depending on the application amount and is, in a usual use (an application basis weight of 1 mg/cm 2 or more and 3 mg/cm 2 or less), preferably 0.3 μm or more and 30 μm or less and more preferably 0.5 μm or more and 20 μm or less. The thickness is measured after application to a substrate with a contact coating thickness gauge (manufactured by Mitutoyo Corporation, Litematic VL-50A) on the substrate. Incidentally, the substrate used here is made of PET.
- Regarding the above-described embodiments, the present invention further discloses the following composition, producing method, and film.
- <1> A film-forming composition for skin comprising the following components (A) and (B):
-
- (A) a powder; and
- (B) a fiber having an average fiber diameter of 0.1 μm or more and 7 μm or less and an aspect ratio (average fiber length/average fiber diameter) of 20 or more and 300 or less in an amount of 0.1 mass % or more and 10 mass % or less relative to the whole film-forming composition,
- wherein
- the mass ratio of the component (B) to the component (A), (B/A), is 0.02 or more and 0.4 or less.
- <2> The film-forming composition for skin according to <1>, wherein the component (B) is a fiber of a water-insoluble polymer.
- <3> The film-forming composition for skin according to <1> or <2>, wherein the component (B) has an aspect ratio (average fiber length/average fiber diameter) of 25 or more and 300 or less.
- <4> The film-forming composition for skin according to any of <1> to <3>, wherein the content of the component (A) relative to the whole film-forming composition is 0.5 mass % or more and 98 mass % or less.
- <5> The film-forming composition for skin according to any of <1> to <4>, further containing a component (C) nonvolatile liquid material.
- <6> The film-forming composition for skin according to any of <1> to <5>, wherein the component (A) is one or more selected from the group consisting of extender pigments and color pigments and preferably includes a color pigment.
- <7> The film-forming composition for skin according to any of <1> to <6>, wherein the component (A) includes one or more color pigments selected from the group consisting of inorganic color pigments, inorganic white pigments, organic color pigments, organic dyes, and pearl pigments (brilliant powders).
- <8> The film-forming composition for skin according to any of <1> to <7>, wherein the component (A) contains a color pigment, and the content of the color pigment in the film-forming composition is 0.1 mass % or more and 60 mass % or less.
- <9> The film-forming composition for skin according to any of <1> to <8>, wherein the content mass ratio of the color pigment (A1) to the component (A), (A1/A), is preferably 0.3 or more, more preferably 0.4 or more, and further preferably 0.5 or more and is preferably 1 or less, more preferably 0.95 or less, and further preferably 0.9 or less.
- <10> The film-forming composition for skin according to any of <1> to <9>, wherein the component (B) has an average fiber diameter of 0.2 μm or more and 5 μm or less, preferably 0.3 μm or more and 4 μm or less, and further preferably 0.3 μm or more and 3 μm or less.
- <11> The film-forming composition for skin according to any of <1> to <10>, wherein the component (B) is a fiber of a water-insoluble polymer.
- <12> The film-forming composition for skin according to any of <1> to <11>, wherein the component (B) is a fiber including one or two or more polymers selected from the group consisting of a completely saponified polyvinyl alcohol that can be insolubilized after film formation, a partially saponified polyvinyl alcohol that can be crosslinked after film formation by using a crosslinking agent together, acrylic resins such as polymethacrylic acid resin, a polyvinylbutyral resin, a polyurethane resin, polylactic acid, an oxazoline-modified silicone such as a poly(N-propanoylethyleneimine) graft-dimethylsiloxane/γ-aminopropylmethylsiloxane copolymer, polyvinylacetal diethylaminoacetate, and Zein; and is preferably a fiber including one or two or more polymers selected from the group consisting of a polyvinylbutyral resin, an acrylic resin, a polypropylene resin, a polyurethane resin, polylactic acid, polybutylene succinate, polyglycolic acid, polycaprolactone, and polyhydroxy alkanoic acid.
- <13> The film-forming composition for skin according to any of <1> to <12>, wherein the component (B) is a fiber including an (octyl acrylamide/hydroxypropyl acrylate/butylaminoethyl methacrylate) copolymer.
- <14> The film-forming composition for skin according to any of <1> to <13>, wherein the component (B) has an average fiber length of 20 μm or more and 300 μm or less, preferably 25 μm or more and 250 μm or less, more preferably 30 μm or more and 200 μm or less, and further preferably 40 μm or more and 200 μm or less.
- <15> The film-forming composition for skin according to any of <1> to <14>, wherein the component (B) has an aspect ratio (average fiber length/average fiber diameter) of 25 or more and 300 or less, preferably 27 or more and 250 or less, and more preferably 30 or more and 200 or less.
- <16> The film-forming composition for skin according to any of <1> to <15>, wherein the CV value of the fiber length of the component (B) is 40% or more and 100% or less, preferably 42% or more and 95% or less, and more preferably 45% or more and 90% or less.
- <17> The film-forming composition for skin according to any of <1> to <16>, wherein the component (B) includes a fiber having an average fiber length of 40 μm or more, preferably 50 μm or more.
- <18> The film-forming composition for skin according to any of <1> to <17>, wherein the (average fiber diameter)2/fiber content (μm2/mass %) in the composition is 0.02 or more and 7 or less, preferably 0.02 or more and 6 or less, more preferably 0.03 or more and 5 or less, and further preferably 0.05 or more and 4 or less.
- <19> The film-forming composition for skin according to any of <1> to <18>, wherein the content of the component (B) is 0.1 mass % or more and 10 mass % or less, preferably 0.5 mass % or more and 9 mass % or less, more preferably 0.7 mass % or more and 8 mass % or less.
- <20> The film-forming composition for skin according to any of <1> to <19>, wherein the mass ratio of the component (B) to the component (A), (B/A), is 0.02 or more and 0.4 or less, preferably 0.03 or more and 0.35 or less, more preferably 0.05 or more and 0.33 or less, and further preferably 0.1 or more and 0.31 or less.
- <21> The film-forming composition for skin according to any of <5> to <20>, wherein the component (C) is preferably one or more selected from the group consisting of water and oils that are liquid at 20° C.
- <22> The film-forming composition for skin according to any of <5> to <20>, wherein the component (C) is water and one or two or more oils selected from the group consisting of ester oils, ether oils, hydrocarbon oils, higher alcohols, fluorine oils, and nonvolatile silicone oils.
- <23> The film-forming composition for skin according to any of <5> to <21>, wherein the component (B) is preferably dispersed in the component (C).
- <24> The film-forming composition for skin according to any of <1> to <23>, wherein the component (B) is a biodegradable resin.
- <25> A method for producing a film on a skin surface, comprising applying the film-forming composition according to any of <1> to <24> to the skin.
- <26> A film including the film-forming composition for skin according to any of <1> to <24>.
- <27> Use of the film-forming composition according to any one of <1> to <24> as an emulsified cosmetic.
- <28> Use of the film-forming composition according to any one of <1> to <24> for makeup and/or ultraviolet protection by applying the composition to skin, preferably, to the face.
- <29> Use of the film-forming composition for skin according to any of <1> to <24> for producing a powder-containing cosmetic film on a skin surface.
- The present invention will now be described in further detail with reference to examples.
- [Production example of component (B)]
- A production example of a fiber B will be shown. (1) An acrylic resin ((octyl acrylamide/hydroxypropyl acrylate/butylaminoethyl methacrylate) copolymer) was dissolved in ethanol to obtain an 18 mass % solution. A nanofiber sheet was formed on the surface of a collector using this solution with the device for an electrospinning method shown in
FIG. 1 . The conditions for manufacturing the nanofiber are as follows: Applied voltage: 30 kV; Capillary-collector distance: 150 mm; Aqueous solution discharge amount: 12 mL/hour; and Environment: 25° C., 30% RH. - (2) The obtained nanofiber sheet was appropriately cut and was then pulverized with an agitation system (manufactured by PRIMIX Corporation, LABOLUTION (registered trademark)) attached with dispersal blades at a rotational speed of 5000 rpm for 30 minutes to obtain a fiber B.
- Fibers A and C to F were manufactured as with the fiber B by changing the polymer concentration, rotational speed, and shearing time.
- A production example of a fiber G will be shown. (1) An ester resin (polylactic acid) was dissolved in a mixture of chloroform and dimethylformamide (mass ratio=80: 20) to obtain a 20 mass % solution. A nanofiber sheet was formed on the surface of a collector, by using this solution with the device for an electrospinning method shown in
FIG. 1 . The conditions for manufacturing the nanofiber are as follows: Applied voltage: 30 kV; Capillary-collector distance: 150 mm; Aqueous solution discharge amount: 12 mL/hour; and Environment: 25° C., 30% RH. - (2) The obtained nanofiber sheet was sheared using a dispersion device (manufactured by Pacific Machinery & Engineering Co., Ltd, Milder) at 13500 rpm and circulating 8 times in a circulation line to obtain a fiber.
- Fiber H was manufactured as in the fiber G by changing the polymer concentration and circulation number.
- As the fiber I, White nylon fiber 0.5-6D manufactured by Cosmeterials, Inc. was used.
- [Production Example of Composition]
- Water-in-oil emulsified compositions were obtained by blending the obtained fibers and the components shown in Tables 1 to 4.
- The finish of the base was evaluated by applying the water-in-oil emulsified compositions shown in Tables 1 to 4 to a pore model at 1 mg/cm 2. In addition, the finish when a powdery foundation was applied in the same amount was also evaluated. The evaluation was performed by comparing with the cosmetic of the reference prescription shown in Table 5 as follows. The results are shown in Tables 1 to 4.
- The cosmetic of the reference prescription (Table 5) and the cosmetics shown in Tables 1 to 4 were applied to a pore model (manufactured by Beaulax Co., Ltd., cheek skin model No. 10A) in half. After the application, the brightness was visually evaluated (N=5, comparison with the reference prescription).
- Subsequently, a powdery foundation (Sofina Alblanc: Transclear White Foundation UV powder) was applied, and the roughness covering effect and the smooth finish were visually evaluated (N=5).
- The evaluation criteria were that when a cosmetic of Tables 1 to 4 was superior to the reference prescription, the score is 1 point; and when there was no difference or when a cosmetic of Tables 1 to 4 was inferior to the reference prescription, the score is 0 point. A highest score is 5 points.
-
TABLE 1 Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 Fiber A Fiber B Fiber C Fiber B Fiber D Fiber B Fiber E (B) Fiber Polymer material Acrylic Acrylic Acrylic Acrylic Acrylic Acrylic Acrylic resin resin resin resin resin resin resin Fiber diameter (μm) 0.3 0.6 0.6 0.6 0.6 0.6 1.8 Fiber length (μm) 50 50 20 50 100 50 50 Aspect ratio 166.7 83.3 33.3 83.3 166.7 83.3 27.8 Rate of the number of fibers having a fiber length 52.3 54.3 10.1 54.3 78.3 54.3 70.9 of 40 μm or more (B) Type of fiber Acrylic Acrylic Acrylic Acrylic Acrylic Acrylic Acrylic resin resin resin resin resin resin resin Powder phase (A) Powder Color pigment Silicone-treated yellow iron oxide 0.01 0.01 0.01 0.01 0.01 0.01 0.01 Silicone-treated red iron oxide 0.03 0.03 0.03 0.03 0.03 0.03 0.03 Silicone-treated black iron oxide 0.001 0.001 0.001 0.001 0.001 0.001 0.001 Silicone-treated fine particle zinc oxide 9 9 9 9 9 9 9 (manufactured by TAYCA Corp. MZY-505M) 25 nm Silicone-treated fine particle titanium oxide 1 1 1 1 1 1 1 (manufactured by TAYCA Corp. MT-500SA) Triethoxycaprylylsilane-treated fine particle 4 4 4 4 4 4 4 titanium oxide (manufactured by Sakai Chemical Industry Co., Ltd., STR-100W) Silicone-treated titanium oxide (manufacture by 0.56 0.56 0.56 0.56 0.56 0.56 0.56 ISHIHARA SANGYOU KAISHA, LTD., CR-50, average particle diameter: 0.25 μm) Extender pigment Silicone-coated talc (JA-68R) 2 2 2 2 2 2 2 Oil phase (B) Fiber Each fiber above 3 1 3 3 3 5 3 (C) Water and nonvolatile Dimethylpolysiloxane KF-96A-1000CS (-G) 5 5 5 5 5 5 5 oil that is liquid at 20° C. Octyl p-methoxycinnamate 4 4 4 4 4 4 4 Water phase Purified water 25 28 25 25 25 20 25 Oil phase Surfactant Polyether-modified silicone (DOWSIL SH3775M FLUID) 2.5 2.5 2.5 2.5 2.5 2.5 2.5 (D) Volatile oil Dimethylpolysiloxane (KF-96L-1.5CS) 10.699 9.699 10.699 10.699 10.699 13.699 10.699 Dimethylpolysiloxane (KF-96L-2CS) 26.5 26.5 26.5 26.5 26.5 26.5 26.5 Water phase Other component Ethanol 6.5 6.5 6.5 6.5 6.5 6.5 6.5 Magnesium sulfate 0.2 0.2 0.2 0.2 0.2 0.2 0.2 Total amount 100 100 100 100 100 100 100 (A) Powder total 16.601 16.601 16.601 16.601 16.601 16.601 16.601 (B) Fiber 3 1 3 3 3 5 3 (C) Water and nonvolatile oil that is liquid at 20° C. 34 37 34 34 34 29 34 Surfactant 2.5 2.5 2.5 2.5 2.5 2.5 2.5 (D) Volatile oil 37.199 36.199 37.199 37.199 37.199 40.199 37.199 (B) (Average fiber diameter)2/fiber content 0.03 0.36 0.12 0.12 0.12 0.07 1.08 (A1) Color pigment 14.601 14.601 14.601 14.601 14.601 14.601 14.601 (A1)/(A) 0.88 0.88 0.88 0.88 0.88 0.88 0.88 (B)/(A) 0.181 0.060 0.181 0.181 0.181 0.301 0.181 Evaluation result Base application (1) Finish of base: bright and toned 5 4 4 4 3 5 4 amount 1 mg/cm2 (Evaluation N = 5 out of 5) With powdery (2) Base + powdery foundation finish: covering 5 4 5 4 4 5 4 foundation in the roughness and pores (Evaluation N = 5 out of 5) same amount (3) Base + powdery foundation finish: smooth finish 5 4 5 4 4 5 4 (Evaluation N = 5 out of 5) -
TABLE 2 Comparative Comparative Comparative Comparative Example 8 Example 9 Example 10 Example 1 Example 2 Example 3 Example 4 Fiber F Fiber G Fiber G Fiber H Fiber B Fiber B Fiber (B) Fiber Polymer material Acrylic PLA PLA PLA Acrylic Acrylic Nylon resin resin resin resin Fiber diameter (μm) 5 1.5 1.5 10 0.6 0.6 20 Fiber length (μm) 50 50 50 50 50 50 500 Aspect ratio 10.0 33.3 33.3 5.0 83.3 83.3 25.0 Rate of the number of fibers having a fiber length 80.4 40.0 40.0 77.3 54.3 54.3 — of 40 μm or more (B) Type of fiber Acrylic PLA PLA PLA Acrylic Acrylic Nylon resin resin resin resin Powder (A) Powder Color Silicone-treated yellow iron oxide 0.01 0.01 0.01 0.01 0.01 0.01 0.01 phase pigment Silicone-treated red iron oxide 0.03 0.03 0.03 0.03 0.03 0.03 0.03 Silicone-treated black iron oxide 0.001 0.001 0.001 0.001 0.001 0.001 0.001 Silicone-treated fine particle zinc oxide 9 9 9 9 9 9 9 (manufactured by TAYCA Corp. MZY-505M) 25 nm Silicone-treated fine particle titanium oxide 1 1 1 1 1 1 1 (manufactured by TAYCA Corp. MT-500SA) Triethoxycaprylylsilane-treated fine particle 4 4 4 4 4 4 4 titanium oxide (manufactured by Sakai Chemical Industry Co., Ltd., STR-100W) Silicone-treated titanium oxide (manufacture by 0.56 0.56 0.56 0.56 0.56 0.56 0.56 ISHIHARA SANGYOU KAISHA, LTD., CR-50, average particle diameter: 0.25 μm) Extender Silicone-coated talc (JA-68R) 2 2 2 2 2 2 2 pigment Oil (B) Fiber Each fiber above 3 3 1 3 0.02 7 3 phase (C) Water and Dimethylpolysiloxane KF-96A-1000CS (-G) 5 5 5 5 5 5 5 nonvolatile oil that Octyl p-methoxycinnamate 4 4 4 4 4 4 4 Water is liquid at 20° C. Purified water 23 23 25 25 30 15 23 phase Oil Surfactant Polyether-modified silicone (DOWSIL SH3775M FLUID) 2.5 2.5 2.5 2.5 2.5 2.5 2.5 phase (D) Volatile oil Dimethylpolysiloxane (KF-96L-1.5CS) 12.699 12.699 12.699 10.699 8.679 16.699 12.699 Dimethylpolysiloxane (KF-96L-2CS) 26.5 26.5 26.5 26.5 26.5 26.5 26.5 Water Other component Ethanol 6.5 6.5 6.5 6.5 6.5 6.5 6.5 phase Magnesium sulfate 0.2 0.2 0.2 0.2 0.2 0.2 0.2 Total amount 100 100 100 100 100 100 100 (A) Powder total 16.601 16.601 16.601 16.601 16.601 16.601 16.601 (B) Fiber 3 3 1 3 0.02 7 3 (C) Water and nonvolatile oil that is liquid at 20° C. 32 32 34 34 39 24 32 Surfactant 2.5 2.5 2.5 2.5 2.5 2.5 2.5 (D) Volatile oil 39.199 39.199 39.199 37.199 35.179 43.199 39.199 (B) (Average fiber diameter)2/fiber content 8.33 0.75 2.25 33.33 18.00 0.05 133.33 (A1) Color pigment 14.601 14.601 14.601 14.601 14.601 14.601 14.601 (A1)/(A) 0.88 0.88 0.88 0.88 0.88 0.88 0.88 (B)/(A) 0.181 0.181 0.060 0.181 0.001 0.422 0.181 Evaluation result Base application (1) Finish of base: bright and toned 5 5 4 0 0 2 2 amount 1 mg/cm2 (Evaluation N = 5 out of 5) With powdery (2) Base + powdery foundation finish: covering 5 5 4 2 0 0 0 foundation in the roughness and pores (Evaluation N = 5 out of 5) same amount (3) Base + powdery foundation finish: smooth finish 5 5 4 2 0 0 0 (Evaluation N = 5 out of 5) -
TABLE 3 Example 11 Fiber B (B) Fiber Polymer material Acrylic resin Fiber diameter (μm) 0.6 Fiber length (μm) 50 Aspect ratio 83.3 Rate of the number of fibers having a 54.3 fiber length of 40 μm or more (B) Type of fiber Acrylic resin Powder (A) Powder Color pigment Silicone-treated yellow iron oxide 0.01 phase Silicone-treated red iron oxide 0.03 Silicone-treated black iron oxide 0.001 Silicone-treated fine particle zinc oxide 9 (manufactured by TAYCA Corp. MZY-505M) 25 nm Silicone-treated fine particle titanium oxide 1 (manufactured by TAYCA Corp. MT-500SA) Triethoxycaprylylsilane-treated fine particle 4 titanium oxide (manufactured by Sakai Chemical Industry Co., Ltd., STR-100W) Silicone-treated titanium oxide (manufacture by 0.56 ISHIHARA SANGYOU KAISHA, LTD., CR-50, average particle diameter: 0.25 μm) Extender pigment Silicone-coated talc (JA-68R) 2 Oil phase (B) Fiber Each fiber above 3 (C) Water and nonvolatile Dimethylpolysiloxane (KF-96L-6CS) 4 oil that is liquid at 20° C. Polyisobutene (Parleam EX (pentamer)) 1 Isononyl isononanoate 2 Diisostearyl malate 2 Water Purified water 25 phase Oil phase Surfactant Polyether-modified silicone (DOWSIL SH3775M FLUID) 2.5 (D) Volatile oil Dimethylpolysiloxane (KF-96L-1.5CS) 10.699 Dimethylpolysiloxane (KF-96L-2CS) 26.5 Water Other component Ethanol 6.5 phase Magnesium sulfate 0.2 Total amount 100 (A) Powder total 16.601 (B) Fiber 3 (C) Water and nonvolatile oil that is liquid at 20° C. 34 Surfactant 2.5 (D) Volatile oil 37.199 (B) (Average fiber diameter)2/fiber content 0.12 (A1) Color pigment 14.601 (A1)/(A) 0.88 (B)/(A) 0.181 -
TABLE 4 Example 12 Fiber B (B) Fiber Polymer material Acrylic resin Fiber diameter (μm) 0.6 Fiber length (μm) 50 Aspect ratio 83.3 Rate of the number of fibers having a 54.3 fiber length of 40 μm or more (B) Type of fiber Acrylic resin Powder (A) Powder Color Silicone-treated yellow iron oxide 0.01 phase pigment Silicone-treated red iron oxide 0.03 Silicone-treated black iron oxide 0.001 Silicone-treated fine particle zinc oxide 3 (manufactured by TAYCA Corp. MZY-505M) 25 nm Silicone-treated fine particle titanium oxide 1 (manufactured by TAYCA Corp. MT-500SA) Triethoxycaprylylsilane-treated fine particle 4 titanium oxide (manufactured by Sakai Chemical Industry Co., Ltd., STR-100W) Silicone-treated titanium oxide (manufacture by 0.56 ISHIHARA SANGYOU KAISHA, LTD., CR-50, average particle diameter: 0.25 μm) Extender Silicone-coated talc (JA-68R) 8 pigment Oil phase (B) Fiber Each fiber above 3 (C) Water and nonvolatile Dimethylpolysiloxane (KF-96L-6CS) 6 oil that is liquid at 20° C. Polyisobutene (Parleam EX (pentamer)) 1 Isononyl isononanoate 3 Diisostearyl malate 3 Water phase Purified water 29 Oil phase Surfactant Polyether-modified silicone (DOWSIL SH3775M FLUID) 2.5 (D) Volatile oil Dimethylpolysiloxane (KF-96L-1.5CS) 9.699 Dimethylpolysiloxane (KF-96L-2CS) 19.5 Water phase Other component Ethanol 6.5 Magnesium sulfate 0.2 Total amount 100 (A) Powder total 16.601 (B) Fiber 3 (C) Water and nonvolatile oil that is liquid at 20° C. 42 Surfactant 2.5 (D) Volatile oil 29.199 (B) (Average fiber diameter)2/fiber content 0.12 (A1) Color pigment 8.601 (A1)/(A) 0.52 (B)(A) 0.181 -
TABLE 5 Reference prescription Powder (A) Color Silicone-treated yellow iron oxide 0.01 phase Powder pigment Silicone-treated red iron oxide 0.03 Silicone-treated black iron oxide 0.001 Silicone-treated fine particle zinc oxide 9 (manufactured by TAYCA Corp. MZY-505M) 25 nm Silicone-treated fine particle titanium oxide 1 (manufactured by TAYCA Corp. MT-500SA) Triethoxycaprylylsilane-treated fine particle 4 titanium oxide (manufactured by Sakai Chemical Industry Co., Ltd., STR-100W) Silicone-treated titanium oxide (manufacture 0.56 by ISHIHARA SANGYOU KAISHA, LTD., CR-50, average particle diameter: 0.25 μm) Extender Silicone-coated talc (JA-68R) 2 pigment Oil (C) Nonvolatile oil Dimethylpolysiloxane KF-96A-1000CS (-G) 5 phase that is liquid at 20° C. Octyl p-methoxycinnamate 4 Surfactant Polyether-modified silicone (DOWSIL 2.5 SH3775M FLUID) (D) Volatile oil Dimethylpolysiloxane (KF-96L-1.5CS) 8.699 Dimethylpolysiloxane (KF-96L-2CS) 26.5 Water (C) Water Purified water 30 phase Other component Ethanol 6.5 Magnesium sulfate 0.2 Total amount 100 -
-
- 10: electrostatic spraying device
- 11: syringe
- 12: high-voltage source
- 13: conducting collector
- 11 a: cylinder
- 11 b: piston
- 11 c: capillary
Claims (9)
1. A film-forming composition for skin, comprising components (A) and (B):
(A) a powder; and
(B) a fiber having an average fiber diameter of 0.1 μm or more and 7 μm or less and an aspect ratio (average fiber length/average fiber diameter) of 20 or more and 300 or less in an amount of 0.1 mass % or more and 10 mass % or less relative to the whole film-forming composition, wherein
a mass ratio of the component (B) to the component (A), (B/A), is 0.02 or more and 0.4 or less.
2. The film-forming composition for skin according to claim 1 ,
wherein the component (B) is a fiber of a water-insoluble polymer.
3. The film-forming composition for skin according to claim 1 , wherein the component (B) has an aspect ratio (average fiber length/average fiber diameter) of 25 or more and 300 or less.
4. The film-forming composition for skin according to claim 1 , wherein a content of the component (A) relative to the whole film-forming composition is 0.5 mass % or more and 98 mass % or less.
5. The film-forming composition for skin according to claim 1 , further comprising a component (C) a liquid material selected from the group consisting of water and nonvolatile oils that are liquid at 20° C.
6. The film-forming composition according to claim 1 , wherein the component (A) includes a color pigment.
7. A method for producing a film on a skin surface, comprising applying the film-forming composition according to claim 1 to the skin surface.
8. A film comprising the film-forming composition for skin according to claim 1 .
9-11. (canceled)
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PCT/JP2021/043012 WO2022114007A1 (en) | 2020-11-30 | 2021-11-24 | Film-forming composition for skin |
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US (1) | US20240065948A1 (en) |
EP (1) | EP4252858A1 (en) |
JP (1) | JP2022087048A (en) |
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JP2001064153A (en) | 1999-08-24 | 2001-03-13 | Shoji Hyodo | Cosmetic incorporated with superfine fiber |
FR2817476B1 (en) | 2000-12-05 | 2003-01-03 | Oreal | MAKE-UP CARE COMPOSITION CONTAINING FIBERS AND A DISPERSING COPOLYMER |
EP1262168A1 (en) | 2001-03-23 | 2002-12-04 | L'oreal | Composition containing fibres to combat the skin aging process |
FR2822377A1 (en) | 2001-03-23 | 2002-09-27 | Oreal | USE OF FIBERS AS ANTI-IRRITANT AGENT IN A COSMETIC OR DERMATOLOGICAL COMPOSITION |
JP4687163B2 (en) | 2004-03-16 | 2011-05-25 | 東レ株式会社 | Formulated solution, emulsion or gel and method for producing the same |
JP5514014B2 (en) * | 2010-06-30 | 2014-06-04 | 花王株式会社 | Sheet-like cosmetic for makeup |
JP7272754B2 (en) * | 2017-04-18 | 2023-05-12 | 花王株式会社 | Coating manufacturing method |
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